bluuebunny/crossref_metadata_2025_split huggingface dataset:
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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

Abstract
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.