bluuebunny/crossref_metadata_2025 huggingface dataset:
Performance Evaluation Solar Charge Controller on Solar Power System Home-Based SPV Amorphous 80 Watt-peak.
Authors: Sofijan Armin , Nawawi Zainuddin , Yudho Suprapto Bhakti , Sipahutar Riman , Bizzy Irwin
Published: May 2020

The problem in renewable energy technology is the capacity stability, battery life and sustainability of energy supply. Similarly, it applies to solar power plant or Solar Home System (SHS). To deal with the required Solar Charge Controller (SCC), the form of electronic equipment that implements the Pulse Width Modulation (PWM) technology in the lead acid battery capacity 120 Ah to set battery charging function and current discharging from battery to load generated by solar Photovoltaic (SPV) Amorphous 80 Wp. Research has been done for systems that work well through the testing phase and data retrieval at the research laboratories. Performance SCC generates the largest current on the current panel 2.08 ampere, at 13.00 pm Use the load Head light of 10 W, 15 W, and 20 W. The load of 10 W generates a current of 0.850.92 A, at a load of 15 W generates a current of 1.23-1.26 A and on Load of 20 W generates a current of 1.77-1.79 A.
The Implementation of YateBTS Based GSM Using Raspberry Pi
Authors: Soim Sopian , Suroso  , Silvia Handayani Ade , Taqwa Ahmad , Shadrina Nur
Published: May 2020

This paper presents YateBTS technology that based on GSM technology that could be solution substitute for Base Transceiver Station in general. This technology system is based on software defined radios and an open sources GSM implementation software. This monitoring system was created using raspberry pi as a workstation and the software defines radio as a transceiver. This paper provides survey of recent open source cellular technologies. It further presents a prototype based on YateBTS for cellular connectivity in developing countries. In lab performance test for the proposed prototype confirm the feasibility of deploying cellular network based on open source technologies as an alternative to conventional mobile operator networks in a bid to solve the challenge. The results of the implementation of this system are the configuration of devices, users, and making calls between fellow users who have registered with YateBTS.
Optimization of Own Electricity Usage with Electricity Supply from Solar Cells at Darajat Geothermal Power Plant
Authors: Chandra Supian Atmodjo Brendy , Dalimi Rinaldy
Published: May 2020

At Darajat Geothermal Power Plant there is the use of the generator’s own electricity for equipment such as cooling water pumps, lubricating oil pumps, oil transfer pumps, lighting lamps, heaters and others. The cost of own-use electricity used by the equipment based on the selling price of electricity from geothermal power plants to PLN is 1,119.74 Rp / kWh. With the potential of solar radiation of 4.90 kWh/m2 per day, optimization of electricity consumption using solar cells and batteries will be carried out. The price of the solar cell is assumed to be 12,000,000 Rp/kW, the battery inverter is 2,000,000 Rp/kW and the battery is 2,350,590 Rp/kW. The lifespan of solar cell equipment and batteries is 20 years. This paper will be simulated in 4 cases and the result will be the price of electricity based on the value of capital divided by the total electricity produced by solar cells and batteries for 20 years. Case 1 when using solar cell day and night using batteries and the result of electricity price for case 1 is 718.648 Rp kWh. Case 2 when using solar cell day and night using its own electricity from the generator and the result of electricity for case 2 is 990.952 Rp/kWh. Case 3 when using solar cell and battery, at night using battery and the result of electricity for case 3 is 711.77 Rp/kWh. Case 4 when using solar cells and batteries, at night using electricity itself from the generator and the results of the case 4 electricity price is 978.005 Rp/kWh. Based on the 4 case simulations, the price of electricity will be cheaper if during the day using a solar cell plus battery and night using a battery, as in case 3, the price of own electricity power plant is 711.77 Rp/kWh.
Analysis of Performance Test and Consumption of BLDC 350 W Motor Power to Mechanical Vibration with Variation of Speed and Load Variation
Authors: Hairul  , Markori  , Indrawasih  , Yahya Sudirman
Published: May 2020

Electric motors Performa with the type of BLDC (Brushless DC Motor) or DC brushless motors are widely used in the industrial sector as movers that have a relatively constant speed, and are also widely used in transportation as electric car drives, electric bicycles and electric motors. In this study a 350 watt BLDC motor was used as the main driver. The motor is controlled via a BLDC Controller with a 48 Volt 10 Ampere variable DC Rectifier. The test is done by measuring the power absorbed by the motor and its speed, and measuring the vibration or vibration of the motor, using a vibration meter. In this study, it is expected that the test results can be analyzed to obtain the performance of a high efficiency BLDC motor that is energy efficient. In this research, the performance of BLDC Motor will be maximal with the use of the smallest wheel transmit when the motor is starting and running condition is using the highest transmission gear. The results of the study are used to improve and improve performance in the manufacture of electric vehicles for competition and commercial use.
SELT Design as a Source of Renewable electricity using the Flywheel Generator and Photodioda Sensor
Authors: Maulana Indra , Seprianto Dicky , Najib Muhammad , Yudhianto Yossy , Azwar Muhamad
Published: May 2020

Day by day, the use of electricity in Indonesia is increasing. This can be shown from the increase use of household electricity consumption in January to June 2018 which reached 42.25 percent or 47.5 TWh and increased by 3 percent per year. This makes many people compete in making free energy. One of the many free energy that is currently made is the energy flywheel. This flywheel uses a flywheel material as an additional material in stabilizing the rotation of a 1 phase motor. It uses sensors that is modified with a voltmeter. It also can be done automatically so that when the voltage reaches 220 V, the input electricity will be disconnected and will use electricity from rotational energy of the generator flywheel.
The Effect of Parameters on the Process of Making Objects with Rapid Prototyping Digital Light Processing Technology on the Bending Stress
Authors: Romli  , Seprianto D , Putra DP , Zamheri  , Rasid M
Published: May 2020

The world is currently entering the era of the industrial revolution of 4.0. The era in which the occurrence of disruptive technology. The main purpose of this existence of the industrial revolution to create stability in the distribution of goods and necessities. Broadly speaking, there are some benefits that can be posed by the presence of the industrial revolution 4.0 is encouraging research, customization, and optimization. In addition, there are several challenges to be faced in the industrial revolution was the first IE 4.0 security, the second is the capital, and then a third that is employment, and the fourth is privacy. A method that can respond to these challenges is additive manufacturing using SLA-DLP 3D Printing. The making of objects utilizing CAD data that have been made in advance. This research aims to know the effect of object making process parameters with digital light processing rapid prototyping technology on bending stress. The parameters investigated is the layer thickness and the exposure time. Test specimens made of a material with liquid photopolymer resin refer to ASTM D 790 using SLA-DLP 3D Printer. Measurement results in data analysis using ANOVA design with type 2 factorial design model and level 1 factorial interactions assisted by software Design Expert trial version. The results of the ANOVA is known that factors significantly (α = 0.001), to effect of object making process parameters with digital light processing rapid prototyping technology on bending stress., that are the layer thickness=10%, exposure time=2%, interaction layer thickness and exposure time=87%.
The Effect of Rectangular Parallel Key Manufacturing Process Parameters Made with Stereolithography DLP 3D Printer Technology Against Impact Strength
Authors: Seprianto D , Sugiantoro R , Siproni  , Yahya  , Erwin M
Published: May 2020

This study aims to determine the effect of the thickness of the Layer and Exposure Time on the strength, impact toughness applied to the prototype of the reduction gear post, test specimens made using SLA DLP 3D Printer with 3D UV Resin Anycubic material and referring to ASTM D-256. In this research, creating objects using SLA DLP 3D Printer uses CAD data which is then converted into G-Code with Creation Workshop software. Factors investigated were layer thickness, exposure time with response impact strength using Charpy method of test specimens. The test result data were analyzed using ANOVA with type 2 factorial level design, 2 factorial interaction design (2FI), and replication 3 modelled by Design-Expert software. The results of the analysis revealed that the main factor that had the most influence on the impact strength of the test specimens was the layer Thickness factor with a percentage contribution of 52%, while the interaction between Layer Thickness and Exposure Time contributed 6%. Based on impact testing with a layer thickness parameter of 0.05 millimetres and an Exposure Time of 15 seconds, the optimal results are an average impact price of the Charpy method 0.005600 Joule/mm2.
Cooling Channel Design for a Built-in Spindle of a Machine Tool
Authors: Li Kun-Ying , Luo Win-Jet , Wei Shih-Jie , Liao Yan-sin
Published: May 2020

The generating heat from bearings and a motor of a built-in high rotating speed spindle of a machine tool has to be dissipated to attain high machining accuracy. In this study, a machine tool with a coolant cooling system for a high rotating speed spindle was investigated. The cooling channel designs in terms of channel pattern and dimensions by the design of experiment method (DOE) on the cooling effect of the spindle were studied. By the optimized cooling channel design, the cooling efficiency can be improved by 57.6% and the generating temperature in the spindle can be reduced by 25.9°C.
The Effect of Surface Modification on Heat Transfer of Heat Exchanger
Authors: Lin Hong-Yi , Wu Yu-Lieh , Yang Kai-Shing , Tseng Chih-Yung , Wu Shih-kuo
Published: May 2020

This study mainly discussed the influence of different surface properties,namely an unmodified copper fin surface and a modified hydrophobic fin surface, on the heat transfer effect of heat exchangers with air velocity ranging from 0.5 m/s to 2.5 m/s and relative humidity of 60% and 90%. The researchers established the following conclusions based on the experiment results. The heat transfer and water removal rates of the two heat exchangers increased with an increase in wind velocity. When the inlet air velocity was increased from 0.5 to 2.5 m/s, the heat transfer and water removal rates of both heat exchangers were increased by approximately 90%.Under similar air velocity conditions, heat exchangers with hydrophobic surfaces constantly removed the condensed water droplets, thereby preventing the water droplets from causing surface thermal resistance. As a result, the condensation heat transfer effect of hydrophobic surfaces was greater than that of unmodified copper surfaces. Compared with heat exchangers with unmodified copper fin surfaces, heat exchangers with hydrophobic surfaces exhibited a 5.56% higher heat transfer efficiency.
Production of Ethyl Ester With The Influence of Electrode type, Rection Time and Electric Voltage From Used Frying Oil
Authors: Moeksin Rosdiana , Ali Farida , Arita Susila
Published: May 2020

Ethyl ester or biodiesel that is an alternative energy because of its renewable nature. The production of ethyl ester involves an alcoholysis reaction between ethanol and triglycerides using a strong base catalyst. The source of triglycerides is derived from used frying oil to increase the economic value of used frying oil whose production in indonesia reaches 4 million tons/year. Used frying oil is taken from restaurants in Palembang, South Sumatra. It has free fatty acid values of 1.024% so that transesterification can be carried out directly using a strong KOH base catalyst. The research was conducted using an electrolysis reaction with NaCl as an electrolyte. Variations of made to the type of electrodes, namely aluminum and stainless steel, the reaction time was 3 hours; 3.5 hours; 4 hours; 4.5 hours; and 5 hours and the supplied current voltage which is 15 V; 25 V; 35 V to see the effect on the percent yield of ethyl ester produced. The highest percent yield of Ethyl Ester was obtained samples with a reaction time of 3.5 hours, a voltage of 35 V, and an aluminum electrode of 99.8%.
Adsorption of Synthetic Dye by Betel Nuts Activated Carbon in a Fixed-bed Column, Experiments and Prediction of Breakthrough Curves
Authors: Cundari L , Fakhri M N , Rizki M Z
Published: May 2020

Wastewater produced from textile industry contains synthetic dye that couldn’t degrade naturally. The dye waste adsorbed in a continuous fixed-bed column by betel nuts activated carbon. The fixed-bed column had 60 cm of height and 2 inches of ID. The synthetic dye solution fed to the top of column with flow 10 ml/min. The column performance was evaluated with varying bed height in 5,10, and 15 cm. The outlet analyzed using UV-Vis spectrophotometer. The increased of bed height indicated longer of breakthrough time and column life. The 15 cm of bed height result column maximum capacity (qexp), % total removal, and total adsorbed dye solute (qtotal) in the amount of 21.99 mg/g, 68.17%, dan 3299.62 g respectively. The prediction of breakthrough curve has been done using kinetic adsorption study the of Thomas, Yoon-Nelson, Adam Bohart, and Bed Depth Service Time (BDST) model. The result of the experiment indicates the kinetic model of Thomas and Yoon-Nelson are the fit models, with the coefficients of regression (R2) are 0.98 and 0.95 at the bed heights of 10 and 5cm.
Value Added Analysis of Beef Floss with Fillers of Papaya Fruits and Banana Blossom’S
Authors: Handayani Sri , Utami Wirawati Chandra , Eva Nirmagustina Dwi , Sarono
Published: May 2020

Beef floss is a complementary food that is very popular with the community. The technology of making beef floss is increasingly varied following the trend of public demand. The problem faced by the household industry that produces beef floss is the high cost of production. Steps to use fiber-rich food sources can be used as a solution to increase the quantity of beef floss production without damaging quality. This research purpose to analyze the value added utilization of fiber-rich materials papaya fruit and banana blossom’s as fillers for beef floss production. The method used in this study is the observation method in the Karya Sejahtera Women’s Farmer Group. Analysis of the data used is an analysis of the value added approach of Hayami. The results showed that the added value created from the processing of beef floss with fillers of papaya fruit provides higher added value compared to the banana blossom’s which is Rp 153,000 / kg value-added ratio to the value of the product of 51% and profit Rp 180,000 / kg with the profit rate of 76%. The value of the profits obtained from the production of beef floss with papaya fruit fillers is higher than the banana floss and original.
Revenue Analysis of Port-City Conceptual Design
Authors: Berawi M A , Miraj P , Islamiah E R , Gunawan
Published: May 2020

Indonesia as a maritime country has the potential to become one of the main global players in logistic distribution. However, the limited port in the country that exist capable to tackle number of cargo handling particularly in the western part of the nation. One of the problems is production center often located far from the distribution center which contributes to the minimum rate of port activities. This paper aims to evaluate port-city concept design may propose potential revenues which may attract investment for development. A combination of primary data and secondary data are used to achieve the targeted objective. The experts involved in this research have a background in regional development and infrastructure from government institutions. The findings illustrate four functions potential offers revenue to the management consist of port, industrial area, supporting infrastructure, and residential. Each of them generates significant revenue with the port as the highest contributor followed by industrial area, residential and supporting infrastructure respectively.
Microbial Community in Constructed Wetland during the Treatment of Domestic Wastewater
Authors: Sri Kandi Putri Eka , Verawaty Marieska
Published: May 2020

Constructed wetland (CW) was operated for treating domestic wastewater for 60 days. Water hyacinth (Eichornia crassipes) and lotus plant (Pistia stratiotes.L) were used for domestic wastewater treatment as vegetation in the CW system. Microbial community existed in the CW was investigated for studying their potential roles in the treatment processes; Samples for microbial composition were collected from the wastewater influent, sediment and the roots of the plants in the CW. During the operational days, the bacterial isolates were morphologically and physiologically characterized; phyto- and zoo-planktons were visualized and identified. The system was able to remove BOD up to 85%, and reducing the level of N up to 78%. There were identified 37 bacterial isolates comprising of 11 isolates from water, 17 isolates from sediment and 9 isolates from the roots. The identified bacterial isolates belong to groups Acinetobacter, Aeromonas, Flavobacterium, Lucibacterium, Paracoccus, Proteus, Pseudomonas, and Vibrio. These following species were also identified during the system was running; they were Pandorina morum, Phacus sp, Euglena acus, Lepocinclis cudata, Scenedesmus acuminatus, Raphidonema spiculiforme, Euglena sanguinea, and Eudorina sp.
Grip Tool CNC Mill 3A to Get 12 Sides of the Elbow on Results Induction Electric Furnaces Casting
Authors: Suryana Didi , Anwar Sani Almadora , Azharudin  , Safei  , Indra HB
Published: May 2020

CNC Mill 3A is able to make objects with other shapes, such as: gear, face mill, spiral, drilling, reaming, and grooving. Face mill is the process of working the Mill by levelling the work surface horizontally and vertically. Work pieces produced from electric/induction furnaces then processed for finishing can use a CNC Mill 3A machine. To make the elbow angle of the work piece experienced by the angle experiencing slope of the angle, so that it does not get the optimal angle of the elbow. The process of gripping the vise makes the work piece not optimal, making 12 sides of the cube not yet become elbows. Various ways are engineered to make the sides into elbows. One way to make the elbow by giving additional objects to one side of the work piece, the results were not optimal. For this reason, a gripping system was designed for the CNC milling machine vise. This aid is placed on the side of the vise, between the fixed jaw and the moving jaw.
Factors Affecting Knowledge Sharing Capability Of Doctors In Palembang
Authors: Ariati Nining , Indra Sensuse Dana , Wuri Handayani Putu
Published: May 2020

The need for fast and accurate information about medical practices continues to increase, demanding doctors and hospitals be involved in the knowledge sharing process. This study analyzes the factors that influence the use of ICT (smartphone technology) by doctors and how ICT factors, individuals, and organizations influence the knowledge sharing capability of doctors. Data analysis was conducted on 120 doctors from three hospitals in Palembang City. The results of data processing performed indicate a positive influence of usefulness on ICT use; enjoyment helping other, trust, reward system, top management support and ICT use towards knowledge sharing capability.
Challenges of Teaching in Massive Open Online Course
Authors: Ahmad M A , Hussin A R C , Dahlan H M , Mahmood J
Published: May 2020

MOOC or Massive Open Online Course had gathered considerable interest as a new approach towards leveraging technology in higher education. It can be identified as a disruptive innovation in e-learning and MOOC research also had grown rapidly in terms of peer-reviewed studies over this few years. But until now, majority of MOOC based studies focuses on the learner’s perspectives. Surprisingly, there were limited studies towards MOOC instructor who plays important role in MOOC success. One of the essential aspects that need to be reviewed are the recent challenges faced by the instructor. Challenges are important because it is closely related to the cost of teaching MOOC. Based from the previous studies, they are not focuses exclusively on challenges faced by instructor. It mostly based on instructor’s overall experiences and also as secondary consideration behind learner’s perspectives. Besides that, they do not provide a comprehensive list of recent challenges that are vital towards understanding instructor’s problems in teaching MOOC. This study addressed these issues by investigating the literature on recent challenges faced by instructors in teaching MOOC. It is accomplished by conducting a systematic literature review on the recent literature from 2015 to 2018. 30 MOOC instructor perspectives studies were found where 12 studies are selected as primary studies. The findings offer current statistics of studies that provide recent challenges faced by instructors. 35 recent challenges had been identified we categorize them to 6 main themes of challenges.
Analysis Of Soa Framework For Real Estate Industry
Authors: Scelen  , Januar Lutfi , Nurul Fajar Ahmad
Published: May 2020

This study focus to analysis business model for SOA framework implementation in property in real estate commerce. It cause of the improvement of revolution industry for support real estate industry. Although many of e-commerce has been support real estate industry, however there is a challenge to build SOA framework to improve it. Research method in this study is observe the phenomenon, literature review, and analysis business model with business canvas model. We proposed the business model and analysis system requirement of SOA framework to support real estate industry. We create recommendation to integrate the ecosystem in the real estate industry which is different and various platform and applications. It cause the integration is needed and to improve the seamless integration.
The Utilization of Ontology in Association Rule
Authors: Wardani Dewi , Khusyaini Achmad
Published: May 2020

Association rule is one of the data mining techniques to find associative combinations of items. There are several algorithms including Apriori, FP - Growth, and CT-Pro. One of the advantages of the Apriori algorithm is that it produces many rules. To improve its result, one of the methods is by using the semantic web technology. This work proposes how the hierarchical type of ontology can be utilized by the Apriori algorithm to improve the results. The Apriori with ontology implements the Interestingness Rule (IR) which is a parameter to determine the degree of association between combinations of items in a dataset. The series of experiments show that the proposed idea can improve the results compare to the default Apriori algorithm.
User Satisfaction Level on Implementation of SISKEUDES Application
Authors: Mardiana  , Hartati Eka
Published: May 2020

SISKEUDES is a village finance application developed in 2015 by the Financial and Development Supervisory Agency. The application of the new SISKEUDES application for several years has been implemented in South Sumatera and it can be determined that there is no measurement of user satisfaction. The purpose of this study was to measure the level of user satisfaction using the Green Pearson model which consists of variable ease of use, customization, download delay and content. The results of this study on the Customization variable had the highest score of 79%, which means that the SISKEUDES application is in line with the expectations of users in the display of attractive applications and the information presented is easily understood, especially by village finance operators. Whereas the User Satisfaction variable had the lowest value of 37%, which means that for now the SISKEUDES application cannot be accessed with media gadgets because this application can only be accessed by a computer or laptop with application that has been installed.
Use of Haversine Formula in Finding Distance Between Temporary Shelter and Waste End Processing Sites
Authors: Agramanisti Azdy Rezania , Darnis Febriyanti
Published: May 2020

One way to handle waste of garbage problems can be done by determining the location of any Temporary Shelters that can be visited first. To determine this, it is necessary to find the distance between the location where the driver is located and which Temporary Shelter is available. This study aims to find the distance between the location of drivers and Temporary Shelters using the Haversine formula that can produce a distance between two points on the surface of the globe. The study was conducted by taking the location of drivers and Temporary Shelters in the form of coordinate points, calculating the distance between the points where drivers and Temporary Shelters are located, and comparing the results of distances obtained. The results of the study are a list of drivers and Temporary Shelters’ distances from the smallest order. With the selection of visits from the closest distance first, it is expected that drivers can save costs and travel time taken to visit all Temporary Shelters and end up at Waste End Processing Sites.
Genetic Algorithm Based Feature Selection With Ensemble Methods For Student Academic Performance Prediction
Authors: Farissi Al , Mohamed Dahlan Halina , Samsuryadi
Published: May 2020

Student academic performance is an important factor that affect the achievement of an educational institution. Educational Data Mining (EDM) is a data mining process that is applied to explore educational data that can produce information related to student academic performance. The knowledge produced from the data mining process is used by the educational institutions to improve their teaching processes, which aim to improve student academic performance results. In this paper, a method based on Genetic Algorithm (GA) feature selection technique with classification method is proposed in order to predict student academic performance. Almost all previous feature selection techniques apply local search technique throughout the process, so the optimal solution is quite difficult to achieve. Therefore, GA is apply as a technique of features selection with ensemble classification method in order to improve classification accuracy value of student academic performance prediction, as well as it can be used for datasets with high dimensional and imbalanced class. In this paper, the data used for experiments comes from Kaggle repository datasets which consists of three main categories: behaviour, academic, and demographic. The performances evaluation used to evaluate the proposed method is the Area Under the Curve (AUC). Based on the results obtained from the experiments, shows that the proposed method makes an impressive result in the predictions of student academic performance.
Mobile Robot Motion Control Based on Static Hand Gesture
Authors: Sri DS , Rian FP , Ahmad Z
Published: May 2020

The hand gesture is a form of human expression in communication through hand movements. Hand gesture provides an alternative way for interaction between humans and machines, in this case, a mobile robot. This study discusses the application of static hand gestures to mobile robot motion, the hand used is the right hand. The static hand gesture used consists of six static hand gestures to stop, forward, reverse, turn right, turn left and spin. This system consists of a leap motion, a computer, a microcontroller, and a dc motor robot wheel. The results of this study the robot can respond properly by given hand gesture commands. The results of the response time of the robot to the hand gesture command an average of 1 second.
Development Analysis For Numbers And Colors Learning Media
Authors: Sriyeni Yesi , Veronica Maria
Published: May 2020

Studying numbers conversion sometimes becomes quite difficult to be absorbed directly by students. It isn’t enough to rely only on reference books and lecturer’s explanation while learning in class. The use of this application is later expected to help the learning process in the conversion of numbers and colors material. Interest in learning and teaching will be more encouraged by the presence of learning aids. This multimedia learning to convert numbers and colors will be built on the Android platform. One of its flagship features is a quick count tool in the form of a number and color conversion calculator. Analysis of the development of this application uses the PIECES method (Performance, Information, Economy, Control, Efficiency, and Services). Modeling the application using the UML concept. The intended modeling focus on the design of actors as application users and also the concept of application navigation.
Object-Based Design and Modeling Batik Nusantara Catalog Wibatara.com
Authors: Adelin  , Sri Handayani Febria
Published: May 2020

The existence of batik as one of Indonesia’s cultural heritages lately has been echoed to become a fashion trend for young and even foreign generations. The preservation of batik needs to be done by introducing it as widely as possible. It is also commensurate with UNESCO’s decision to recognize that batik is a world cultural heritage that was born from Indonesia. In addition, the number of studies and free articles that discuss about the nusantara batik in various media also contributed to the reason for the development of wibatara.com as a batik catalog of the nusantara. Wibatara.com will gather information about batik in the form of an online catalog. Wibatara.com development uses extreme programming. While modeling the process using Unified Modeling Language (UML). It also produced an interface design for admins and visitors.
The impact of Negative to Positive Training Dataset Ratio on Atrial Fibrillation Classification Machine Learning Algorithms Performance
Authors: Firdaus  , Herviant Juliano Andre , Rachmatullah Naufal , Putri Rafflesia Sarifah , Yunika Hardiyanti Dinna , Zarkasi Ahmad , Pratiwi Arisanti Ferlita , Nurmaini Siti
Published: May 2020

With the few numbers of cardiologists in Indonesia who not evenly distributed, especially in rural areas, there has been a lot of smart telehealth specifically developed for heart monitoring using ECG. Many techniques have been developed to improve the accuracy of this device by using datasets that are mostly imbalanced, more positive data than negative. This paper presents the comparison of negative to positive training dataset ratio on atrial fibrillation classification machine learning algorithms performance. An AliveCor ECG recording dataset is train with deep neural networks, support vector machine and logistic regression as classifier with three different ratios, 1:1, 1:5 to 1:All. Results show an increase in classifier performance along with the increasing number of negative data.
The Automatic Door Lock to Enhance Security in RFID System
Authors: Hasan Yordan , Abdurrahman  , Wijanarko Yudi , Muslimin Selamat , Maulidda Renny
Published: May 2020

This paper presents an automatic door lock as the classroom security system in the Electrical Engineering Department. This system use the ID Card (RFID) as the security key that connect to the server. ID Card as the input to trigger the microcontroller and send the data processing to the server. The server will give the instruction to the microcontroller as the input to the magnetic lock door. The aims of this study are to keep the security of the classroom based on arduino mega and verify the effectiveness of the classroom security door. The research method of this study are study of literature review, designing of the device and testing the system. The result show that the RFID card of classroom security door in Politeknik Negeri Sriwijaya based on arduino mega help the lectures improve the security, comfortability and the analysis descriptively found that the device can run effectively.
A Dynamical Machine Control System using Simple Processing Unit Based-on FPGA
Authors: Wibowo F W
Published: May 2020

This paper aims to design a dynamic machine control system device. The proposed dynamic device models are a combination architecture of memory and Arithmetic-Logic Unit (ALU). The configuration of the memory has used a random access memory (RAM), and the configuration of ALU is the core of the central processing unit (CPU), which consists of two functions, namely the arithmetic unit and the logical unit. In this paper, the arithmetic unit consists of addition, subtraction, multiplication, and division, whereas the logical units are AND, OR, NOT, and XOR. The shifter circuit in this paper was also applied to complete the programming code instructions in a software approach. The arithmetic unit and logic unit selector path in the ALU configuration employed a multiplexer circuit. This paper used a top-down design technique by determining the components in implementation. By knowing the function and work of these components, it is much easier to combine the components employing the configuration code of the hardware description language, namely a Very High-Speed Integrated Circuit Hardware Description Language (VHDL). The implementation of the VHDL code was configured into the Xilinx Spartan-3E Field Programmable Gate Array (FPGA) to determine the component consumption and the resulted delay time. The results obtained from the configuration of the ALU components consume 26 slices, 50 4-input look-up table (LUT), 17 input/output (I/O), and 17 Bonded IO, while the component delay time is 11,413 ns.
Robust IHWT- CRT Image Watermarking using YCbCr Color Space
Authors: Sari C A , Utariyanto  , Setiadi D R I M , Rachmawanto E H , Sarker Md K
Published: May 2020

This research proposes a watermarking method that combines Integer Haar Wavelet Transform (IHWT) and Chinese Remainder Theorem (CRT) algorithms on RGB images that are converted to YCbCr color space. The goal is to get a watermarking method that is robust, imperceptible and secure. Robust because with IHWT done on component Y as a place to insert a watermark done on the frequency domain that is resistant to attack. Whereas CRT is an insertion method in a spatial domain that is relatively more imperceptible to human vision, CRT also more secure because CRT is a cryptographic algorithm. Based on the results of the test and bookkeeping of the imperceptibility quality, the average PSNR value is above 48dB and the average SSIM is above 0.99. Whereas the robustness test proves that by using the YCbCr color space the increase in resistance occurs in Gaussian noise, JPEG compression and JPEG 2000 compression with an average NC value above 0.8.
Investigation of Medical Image Segmentation Using Machine Learning Based Fuzzy Reliability Function for MIoT
Authors: Omran S H , Ali M H , Hajer M A
Published: May 2020

Nowadays the image segmentation is placed a crucial role in the medical image analysis process. The automatic image segmentation process using Medical Internet of Things (MIoT) is applied to the image for analyzing the various directions such as horizontal and vertical to identify the abnormal growth of the cells present in the human part. In the recent past less accurate, more noise, high error rate and false segmentation, lead to reduce the entire disease identification process. In this research work, automatic image segmentation process using multimodal machine learning based segmentation with fuzzy reliability function techniques used to minimize the false segmentation rate and increase the recognition accuracy. This research presenting the medical imaging of the brain and retina has been segmented for clinical experimental analysis by applying the various unsupervised clustering technique and edge detection techniques to improve efficiency of the system in MIoT environment.
LSB-based Bit Flipping Methods for Color Image Steganography
Authors: Astuti E Z , Setiadi D R I M , Rachmawanto E H , Sari C A , Sarker Md K
Published: May 2020

Imperceptibility is one of the most important aspects of the steganography method. Specifically, for steganography in images, embedded messages must not be felt by the human visual system. Humans have a higher sensitivity in color images compared to grayscale images, therefore the method that is still being tested on grayscale images needs to be retested on color images. Previous research has shown that the bit flipping method can increase imperceptibility to around 9dB in grayscale images. In this research the bit flipping method is tested on color images in the RGB format, the message capacity embedded in the image is 1 bit per pixel. The results of the imperceptibility test turned out to result in a more varied increase due to the greater number of layers in the color image. However, the bit flipping method is also proven to work well on color images, and even a maximum PSNR increase of more than 13dB. At the extraction stage, the message image can also be extracted perfectly, namely with the value NC = 1.
Question Answering Systems on Holy Quran: A Review of Existing Frameworks, Approaches, Algorithms and Research Issues
Authors: Utomo F S , Suryana N , Azmi M S
Published: May 2020

Question Answering System has the ability to present an answer based on a question submitted by the user in natural languages. This system consists of question processing, document retrieval, and answer extraction component. Challenge to optimize Question Answering’s system is to increase the performance of all components in the framework. The performance of all component which has not been optimized has caused to the lack of accurate answer from the systems. Based on this issue, the purpose of this research is to investigate the research gaps in the current state of existing Question Answering Systems on Holy Quran. The result of this study reveals potential research issues, namely morphology analysis, question classification, search techniques, and ontology resources.
Comparison of engine performance of Bajaj Qute RE60 using gasoline and LPG
Authors: Widodo E M , Setiyo M , Rosyidi M I , Purnomo T A , Husni M , Sudaryono S
Published: May 2020

Bajaj Qute 4 wheel has become a new variant as an alternative to short-distance transportation in several cities in Indonesia. At present, the fleet operates with gasoline. Meanwhile, several fuel stations in several major cities in Indonesia have been equipped with LPG dispensers. Therefore, this study was conducted to compare the torque and power of Bajaj Qute with gasoline and LPG. The test is carried out in chassis dynamometer by the coast-down test method to get the actual torque and power characteristics of the car. The result, even though torque and power with LPG are slightly lower than gasoline, LPG remains promising as an alternative fuel because it is cleaner.
Estimated corrosion resistance of nickel-plated fuel tanks on RON 92 and RON 90 fuels
Authors: Mulyaningsih N , Tidarriano B B
Published: May 2020

The use of fuel by the driver can cause fuel tank corrosion problems. Corrosion can cause a fuel tank with holes and this can be dangerous for motorists. So it needs innovation to solve these problems. In previous studies research has been done but the results are less than optimal. Therefore in this study the fuel tank was electroplated first then corrosion tested. The research method begins with the preparation of materials and tools, cutting fuel tanks, and electroplating. Then, next with the corrosion test using a variation of fuel. The results of this study indicate that. The corrosion rate of RON 94 is 0.020 mmpy while the corrosion rate of RON 92 is 0.023 mmpy. And it can be concluded that the use of RON 94 is more able to reduce the corrosion rate of fuel tanks than RON 92.
The effect of the carbonization period to the yield of biomass charcoals of secang, roda, ketapang and siwalan fruits using the small scale PEM A – HRV furnace
Authors: Hatiningrum W R , Suparno  , Huzein A , Syahputra R D , Rahangmetang A D
Published: May 2020

Four kinds of fruit waste in Blora and Tuban, Java Island, still have calorific values which could be harvested as a daily house hold energy source after they turn to charcoals. A small scale carbonization furnace needs to be designed to fulfil this purpose. This research aims at testing an impact of carbonization period to the yield of secang, roda, ketapang and siwalan (skin) fruit charcoals using PEM A-HRV furnace. The furnace was designed only for 4(four) kg in capacity to minimize emission during carbonization. The carbonization temperature was set at 400 ° C with the optimum carbonization period of 4(four) hours in the maximum furnace capacity. A natural draft inlet oxygen system was used for carbonization. The charcoal yielded was between 21.77 % to 32.57 % weight averaged from the 16 times tests. The Calorific values of charcoals vary from 5240 calorie/gram to 6490 calorie/gram (air dry basis) depending on the type of the fruit charcoal. The volatile matter content was still more than 20 % in weight (air dry basis) in the average, saying that the temperature for carbonization needs to be increased even though this may decrease the charcoal yield.
Thermal analysis simulation of parallel cell in modular battery pack for electric vehicle application
Authors: Raharjo J , Wikarta A , Sidharta I , Yuniarto M N , Rusli M R
Published: May 2020

Modular design of battery pack for electric vehichle (EV) is an important things to consider. Because in modular battery pack, cost to manufacture can be reduced also easiness in handling. Modular battery pack also meant to be easily swapped between every modules. In this paper were presented the thermal analysis of modular battery pack that generate heat during charging or discharging process. Heat flux generated by the batteries will affect its surrounding thus increase the temperature of the batteries. Thermal analysis simulation were conducted to understand the thermal behaviour of the battery module. Thus the heat generated not exceed the maximal operational temperature of the battery cells that can reduce the battery life. The simulation is done by analyzing the heat power generated by the cells, the effect on surrounding air, and heat generated by the current flow in the circuit. Simulation result were showing that the the thermal behaviour of the module battery can be secured under its maximal operating condition. Because thermal stability having the largest effect on reliability on operational condition of battery pack.
Correlation of modulus elasticity between Light Weight Deflectometer (LWD) and Dynamic Cone Penetrometer (DCP) for subgrade of pavement
Authors: Sudarsono I , Aisyah L , Prakoso R N P
Published: May 2020

Pusjatan LWD is an equipment that is purposed to measure the structural strength of a pavement system especially unpaved roads. When the load of LWD falls, it generates vibration recorded by geophones. By using the principles of vibration theory then resulting deflection can be calculated. The deflection value is used for the calculation of modulus elasticity of soil using Boussinesq formula. The LWD is applied to Pusjatan’s yard in Bandung for sample of subgrade, where in each location we have taken ten data using LWD and DCP on the same tested points. The reason of comparing between LWD and DCP is that the former equipment used to measure the subgrade structural strength. The test results are a modulus elasticity then correlated with each other. The test results obtained the determination coefficient r2 = 0.7558, this means that the correlation value is 75.58% determined by the modulus of elasticity value of the DCP measurement, whereas on hard soil the correlation between modulus of elasticity of LWD with DCP Index, with the results r2 = 0.9684 or 96.84%. This indicates a strong correlation. This finding comes to the conclusion that Pusjatan’s LWD can be used to test structural strength of subgrade.
Comparison of effect of chitosan and chitosan nano emulsion on growth performance, water quality and protein retention of Koi fish (Cyprinus Caprio Koi)
Authors: Sari A M , Hendrawati T Y , Erdawati  , Ramadhan A I
Published: May 2020

Koi fish is one of high economic value fish because of its beautiful body shape and colour. Its colour is influenced by the protein and carotenoid-rich feed. The sources of protein and carotenoid used as supplement were chitosan and chlorella. The purpose of this study is to evaluate the effect of protein and carotenoid-rich feed using chitosan, chitosan nano emulsion and chlorella on growth performance, water quality and protein retention of Koi Fish. Experiment was conducted by preparing the chitosan nano emulsion and formulated as Koi fish feed. The growth performance and protein retention of Koi fish and water quality were evaluated using ANOVA. In the experiment, Koi fish (mean initial wet weight 1.49 g) were fed with three diets (control, chitosan and Nano chitosan emulsion) in triplicate for 60 days. The result shows that growth performance of Koi fish fed chitosan nano emulsion diet was higher (P<0.05) than other diets. Koi fish in chitosan diet group was higher (P<0.05) than of Koi in control but no statistical difference was found in Koi of chitosan nano emulsion diet groups with protein retention 57.03 ± 1.76 and the water quality showed Ph 7.32, DO = 6.23, NH3 = 0.03, NO2 = 0.0075 and NO3 = 0.03 mg/L.
Modeling of oil palm frond gasification process in a multistage downdraft gasifier using aspen plus
Authors: Saleh A R , Sudarmanta B , Mujiarto S , Suharno K , Widodo S
Published: May 2020

Oil palm plantations produce waste that has not been used so far, namely Oil Palm Fronds. This waste can be converted into energy in the form of producer gas using gasification technology. This study aimed to model the gasification process using Aspen Plus in a multi-stage gasifier by adding air at the pyrolysis and oxidation zone. The influence of variations in air ratio (AR) between the pyrolysis and oxidation zones have been analyzed. The results of this model are validated with experimental data to get accurate results. Based on the modeling results H2 content for all variations of Air Ratio (AR) has increased from 8.12% in single-stage to 9% in multi-stage. However, when viewed from the total efficiency was lower than single-stage gasification. It can be concluded that multi-stage gasification can be applied to improve gasification performance, especially to increase volumetric percentage of hydrogen. However, when viewed from the total efficiency was lower than single-stage gasification. Overall, the results of gasification modeling using Aspen Plus can be used as a reference to improve gasification performance.
Performance and emission characteristics of LPG in a spark-ignition engine
Authors: Nagoro I H A , Suryono E , Prasetyo R D , Nandita S H A
Published: May 2020

This experimental study was carried out to understand the characteristics of a liquefied petroleum gas (LPG) compared to Pertamnina fuel product such as Pertamax (RON 92) and Pertamax Turbo (RON 98) in spark ignition engine. In our project, liquid fuel delivery system was controlled by the carburettor and conversion into LPG fuel supply system was controlled by Arduino Uno. The experimental result showed that liquid fuel was reach more better motor performance than the LPG, the highest power was reach by Pertamax Turbo of 7.5 HP at engine rpm 5,750 rpm, followed by Pertamax of 6.05 HP at engine rpm 6,050 rpm, and the lowest power was 2.61 HP was reach by LPG at 11,650 rpm. On the other hand, HC, CO, and CO2 of LPG fuelled engine resulted in the lowest emissions benefit over a wide range of engine operating condition.