JOIN (Jurnal Online Informatika)
JOIN (Jurnal Online Informatika) is a scientific journal published by the Department of Informatics UIN Sunan Gunung Djati Bandung. This journal contains scientific papers from Academics, Researchers, and Practitioners about research on informatics. JOIN (Jurnal Online Informatika) is published twice a year in June and December. The paper is an original script and has a research base on Informatics.
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<![CDATA[Reducing Free Riding Behaviour in Collaborative Work with Computer Supported Tools ]]>
<![CDATA[Wieger Kloppenburg]]>;
<![CDATA[Eva Nurlatifah]]>;
<![CDATA[Christian Spijkerboer]]>;
<![CDATA[Fitri Almira Yasmin]]>
<![CDATA[ JOIN (Jurnal Online Informatika) Vol 3 No 1 (2018) ]]>
Publisher : <![CDATA[Department of Informatics, UIN Sunan Gunung Djati Bandung ]]>
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DOI: 10.15575/join.v3i1.180
<![CDATA[Free riding behaviour is a problem that has been around for many years. With all the new technological advances, there is much more collaborative work supported by online tools. These developments make it easier for individuals to become a free rider. This research carried out a literature study, to find the best method to reduce free-riding behaviour. Besides the methods, this study also elaborates some factors that trigger free riders in a group. The methods which are highlighted in this research are the implementation of assessments, group awareness tools, sufficient group size and enhancing team morale. However, the study found that none of the methods cover all the aspects of free-riding behaviour. It is suggested by this research to combine and improve various methods, to a new method that can effectively reduce free-riding behaviour in collaborative work with computer-supported tools.]]>
<![CDATA[Implementasi Komputasi Paralel untuk Optimalisasi Komputasi Pada Aplikasi Transliterasi Huruf Latin ke Aksara Jawa ]]>
<![CDATA[Ala Syauqi]]>;
<![CDATA[Anis Nurul Hidayah]]>
<![CDATA[ JOIN (Jurnal Online Informatika) Vol 3 No 1 (2018) ]]>
Publisher : <![CDATA[Department of Informatics, UIN Sunan Gunung Djati Bandung ]]>
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DOI: 10.15575/join.v3i1.179
<![CDATA[Javanese script is one of the ancestral heritage of Indonesia that must be preserved. Nowadays javanese script is increasingly abandoned, since latin writing is often used in daily activities. This is become worse by student difficulties of learning to read and write javanese script because the methods are less attractive for example teacher centered learning. One of solution to solve this problem is interactive latin to javanese script transliteration application. Research on the latin to javanese script transliteration has been produced various applications such as JawaTex, Hanacaraka, and Pandawa. From these three applications is showed that the Pandawa application with decision tree method has the highest level of accuracy. However, the computational time required by this application method is also highest than other applications. The more transliterated text is conduct the longer process time is used. This research aims to shorten Pandawa application computing time with parallel computing method without modifies decesion tree algorithm. Parallel computing is implemented with multithread on java programming language to perform the process of latin into javanese script transliteration simultaneously. Experimental results obtained that the implementation of multithread in decicion tree method for latin into javanese script transliteration reduce the average computation time up to 97.05%.]]>
<![CDATA[Pengembangan Laboratorium Virtual Fisika Osilasi ]]>
<![CDATA[Rizal, Adhi]]>;
<![CDATA[Adam, Riza Ibnu]]>;
<![CDATA[Susilawati, Susilawati]]>
<![CDATA[ JOIN (Jurnal Online Informatika) Vol 3 No 1 (2018) ]]>
Publisher : <![CDATA[Department of Informatics, UIN Sunan Gunung Djati Bandung ]]>
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DOI: 10.15575/join.v3i1.140
<![CDATA[This research aims to develop a virtual lab application with oscillation concept. Oscillation concept in this application is described as pendulum motion. The application was developed by using the ADDIE model and Easy Java Simulations (EJSs) software. It has advantages compared with similar applications, which has a damping coefficient that similar with real world condition. Some other features of the application are the users can run and pause the simulation, observe the details of changes in pendulum movement angle by using step forward button, users can change pendulum mass, adjust the length of the rope, gravitational force, initial angle, damping coefficient, and can observe the change of pendulum angular position in parabolic graphs in real-time. The application was tested using the Technology Acceptance Model (TAM) concept. Based on the research results, the user satisfaction level is categorized as very useful. Therefore, it can be conclude that the application can be accepted and used well by the user.]]>
<![CDATA[Analisa Sentimen Menggunakan Data Twitter, Flume, Hive Pada Hadoop dan Java Untuk Deteksi Kemacetan di Jakarta ]]>
<![CDATA[Buslim, Nurhayati]]>;
<![CDATA[Busman, Busman]]>;
<![CDATA[Sinatrya, Nadika Sigit]]>;
<![CDATA[Kania, Tifani Shallynda]]>
<![CDATA[ JOIN (Jurnal Online Informatika) Vol 3 No 1 (2018) ]]>
Publisher : <![CDATA[Department of Informatics, UIN Sunan Gunung Djati Bandung ]]>
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DOI: 10.15575/join.v3i1.141
<![CDATA[Berikut adalah paragraf yang sudah dirapikan: Traffic congestion in big cities in Indonesia is unavoidable, especially in Jakarta. The increasing number of vehicles and the lack of public transportation are the main causes of traffic congestion in Jakarta. It disturbs people's activities. The government has already made various efforts to resolve the congestion problem; however, it requires high installation and maintenance costs and takes time to be implemented. People often complain about traffic congestion in Jakarta by posting on Twitter, which are called tweets. Every tweet posted is saved in the Twitter API and used for sentiment analysis. It analyzes the emotions of the users. Based on these problems, we conducted research on how to detect traffic congestion in Jakarta. Therefore, we tried to create a Congestion Detection App. We designed the app using UML diagrams. The Congestion Detection App is connected with Hadoop, Flume, Hive, and Derby. The app streams Twitter data collected by connecting with the Twitter API. This app is a Java-based application that can create and view data tables. It performs searches on tweets by ID and analyzes traffic conditions in specific regions in Jakarta. The app performs sentiment analysis on certain tweets and displays the results based on the data tables. The result of the research compares data from the Congestion Detection App with data from Google Maps. We made three value categories consisting of three colors: green for less traffic congestion with a value of 1, orange for medium-scale traffic congestion with a value of 2, and red for heavy traffic congestion with a value of 3. Based on these three categories and values, we used four regions as samples and compared the values with those from Google Maps data to determine accuracy. We achieved an 81% average accuracy from the four samples. The data from the tweet samples compared with Google Maps data showed significant congestion detection with the Congestion Detection App.]]>
<![CDATA[Technology Acceptance in Augmented Reality ]]>
<![CDATA[Yuniarto, Dwi]]>;
<![CDATA[Helmiawan, Muhammad Agreindra]]>;
<![CDATA[Firmansyah, Esa]]>
<![CDATA[ JOIN (Jurnal Online Informatika) Vol 3 No 1 (2018) ]]>
Publisher : <![CDATA[Department of Informatics, UIN Sunan Gunung Djati Bandung ]]>
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DOI: 10.15575/join.v3i1.158
<![CDATA[Augmented Reality is now used in many fields, including in terms of helping the learning process. The purpose of this research is to know the effect of interrelated based on Technology Acceptance model, namely Perceived Usefulness, Perceived Easy to Use, Behavioral Intention Use, and Actual System Use on the use of Augmented Reality based card game. This research resulted that hypothesis in this research accepted after going through data analysis process from questionnaire result. A huge interest in the use of Augmented Reality-based games as actual technology as a factor in whether or not the game is accepted. Users, viewed in terms of ease of use and the benefits posed by the game is also very influential on the acceptance of games based on Augmented Reality.]]>
<![CDATA[Implementasi Wireless Sensor Network Untuk Otomatisasi Suhu Ruang Dan Kelembaban Tanah Pada Greenhouse Berbasis Web Server ]]>
<![CDATA[Adnantha, Yogha Arieka]]>;
<![CDATA[Kusuma, Wahyu Andhyka]]>
<![CDATA[ JOIN (Jurnal Online Informatika) Vol 3 No 1 (2018) ]]>
Publisher : <![CDATA[Department of Informatics, UIN Sunan Gunung Djati Bandung ]]>
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DOI: 10.15575/join.v3i1.169
<![CDATA[Along with the increasing population of Indonesia which is also followed by the increasing rate of urbanization in the industrial sector, certainly affects the reduced agricultural sector to increase food needs. Greenhouse can be one solution to solve this problem, by utilize greenhouse our enviroment can be controlled and also protect the plants from outside interference. During this condition is still done manually both to measure the temperature or watering the plants. In this study the author developed a system to monitor and automate room temperature and soil moisture in greenhouse by utilizing Wireless Sensor Network (WSN) technology. The system consists of 1 node temperature and humidity chamber and 1 node of greenhouse soil moisture where each node is composed of arduino uno as its microcontroller, ESP8266 as Wi-Fi module, sensor, and relay. The results of monitoring and automation data will be sent to the web server by wireless, to make it easier for greenhouse farmers and monitoring their greenhouse. The results of this study can be found that the system is able to monitor and perform automatic control of temperature decrease, when the temperature reaches more than 28C and able to increase soil moisture automatically when the soil moisture is less than 40%, in addition by using ESP8266 data monitoring and automation results can be sent to the web server but based on the test results obtained that the maximum range of data transmission is 50 meters from the node to the access point.]]>
<![CDATA[C4.5 Algorithm Application for Prediction of Self Candidate New Students in Higher Education ]]>
<![CDATA[Darmawan, Erlan]]>
<![CDATA[ JOIN (Jurnal Online Informatika) Vol 3 No 1 (2018) ]]>
Publisher : <![CDATA[Department of Informatics, UIN Sunan Gunung Djati Bandung ]]>
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DOI: 10.15575/join.v3i1.171
<![CDATA[Data mining has a background with the condition of an abundance of data (the overload data) and the explosion of information faced by companies, institutions, or organizations that have been stored for many years. This situation is also faced in several universities that store various kinds of data, especially new admissions databases. However, the abundant data has not been widely used in digging the information or knowledge that can help university management in making strategic plans. Every year there are new students who retire and do not register, therefore, it takes an application that can process a lot of data to find out the possible retirement for new students. To find out the prediction of retirement prospective students, this paper uses C.45 algorithm. The method can change the very large fact into a decision tree that represents the rule. The result of this research is the application can classify the new students in a tree structure in order that it can produce a rule. This application is able to predict the possibility of the retirement of the new student. With this application, it is expected that the possibility of a prospective student retiring from college can be known at an early stage, so the management can make a decision easily. Development of this application uses PHP as the interface application system and MySql in-database processing. The system development methodology uses the waterfall model]]>
<![CDATA[Implementasi Komputasi Paralel untuk Optimalisasi Komputasi Pada Aplikasi Transliterasi Huruf Latin ke Aksara Jawa ]]>
<![CDATA[Syauqi, Ala]]>;
<![CDATA[Hidayah, Anis Nurul]]>
<![CDATA[ JOIN (Jurnal Online Informatika) Vol 3 No 1 (2018) ]]>
Publisher : <![CDATA[Department of Informatics, UIN Sunan Gunung Djati Bandung ]]>
Show Abstract
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DOI: 10.15575/join.v3i1.179
<![CDATA[Javanese script is one of the ancestral heritage of Indonesia that must be preserved. Nowadays javanese script is increasingly abandoned, since latin writing is often used in daily activities. This is become worse by student difficulties of learning to read and write javanese script because the methods are less attractive for example teacher centered learning. One of solution to solve this problem is interactive latin to javanese script transliteration application. Research on the latin to javanese script transliteration has been produced various applications such as JawaTex, Hanacaraka, and Pandawa. From these three applications is showed that the Pandawa application with decision tree method has the highest level of accuracy. However, the computational time required by this application method is also highest than other applications. The more transliterated text is conduct the longer process time is used. This research aims to shorten Pandawa application computing time with parallel computing method without modifies decesion tree algorithm. Parallel computing is implemented with multithread on java programming language to perform the process of latin into javanese script transliteration simultaneously. Experimental results obtained that the implementation of multithread in decicion tree method for latin into javanese script transliteration reduce the average computation time up to 97.05%.]]>
<![CDATA[Reducing Free Riding Behaviour in Collaborative Work with Computer Supported Tools ]]>
<![CDATA[Kloppenburg, Wieger]]>;
<![CDATA[Nurlatifah, Eva]]>;
<![CDATA[Spijkerboer, Christian]]>;
<![CDATA[Yasmin, Fitri Almira]]>
<![CDATA[ JOIN (Jurnal Online Informatika) Vol 3 No 1 (2018) ]]>
Publisher : <![CDATA[Department of Informatics, UIN Sunan Gunung Djati Bandung ]]>
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DOI: 10.15575/join.v3i1.180
<![CDATA[Free riding behaviour is a problem that has been around for many years. With all the new technological advances, there is much more collaborative work supported by online tools. These developments make it easier for individuals to become a free rider. This research carried out a literature study, to find the best method to reduce free-riding behaviour. Besides the methods, this study also elaborates some factors that trigger free riders in a group. The methods which are highlighted in this research are the implementation of assessments, group awareness tools, sufficient group size and enhancing team morale. However, the study found that none of the methods cover all the aspects of free-riding behaviour. It is suggested by this research to combine and improve various methods, to a new method that can effectively reduce free-riding behaviour in collaborative work with computer-supported tools.]]>
<![CDATA[Security Analysis on the Decentralized Energy Trading System Using Blockchain Technology ]]>
<![CDATA[Rahmadika, Sandi]]>;
<![CDATA[Ramdania, Diena Rauda]]>;
<![CDATA[Harika, Maisevli]]>
<![CDATA[ JOIN (Jurnal Online Informatika) Vol 3 No 1 (2018) ]]>
Publisher : <![CDATA[Department of Informatics, UIN Sunan Gunung Djati Bandung ]]>
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DOI: 10.15575/join.v3i1.207
<![CDATA[Blockchain turns both currencies and commodities into a digital form without relying on middleman which allows one person to trade with another include trading the renewable energy. Blockchain technology as a secure and low-cost platform to track the billions of eventual transactions in a distributed energy economy has attracted the attention of experts in various fields of science. The current form of centralized energy trading system is still suffering from security concerns, quality of service, and to name a few. A decentralized energy system using blockchain technology allows the parties to create a trading energy transaction via microgrid. The blockchain technology offers the promise of an immutable, single source of truth from multiple sources without a third-party involvement. In this paper, we describe, explore and analyze the prominent implementation of blockchain technology in the energy sector. Furthermore, we analyze the security issues and highlight the performance of several attacks that might be occurred in the proposed system.]]>
