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Justinus Andjarwirawan
Program Studi Informatika
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Sistem Pakar Diagnosa Kerusakan Pada Gitar Menggunakan Metode Forward Chaining dan Certainty Factor Billy Gracia; Djoni Haryadi Setiabudi; Justinus Andjarwirawan
Jurnal Infra Vol 9, No 1 (2021)
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The guitar is a musical instrument that is in demand by many parties, from beginner to professional musicians. But any musical instrument including the guitar will not be free from damage. There are still many musicians who are confused about the damage they have suffered and do not know what to do with the symptoms they are experiencing. Similar research has been made, namely the application for diagnosing damage to guitars, some using the forward chaining method, some using backward chaining, or dempster-shafers, but in similar studies there is no percentage or level of confidence that can convince users of the diagnostic results, and the user cannot choose how sure to experience the symptoms that occur. Therefore, an expert system is needed to diagnose guitar damage by selecting the symptoms experienced according to the level of confidence, which can detect the damage that occurs and the percentage level of system confidence in the results of the diagnosis to convince the user of the results of the diagnosis..The expert system in diagnosing guitar damage is equipped with Forward Chaining and Certainty Factor methods. The usefulness of Forward Chaining in this diagnostic system is to collect facts or symptoms towards a conclusion, so that users do not need to answer all the questions. By selecting the existing symptoms, a conclusion will be drawn, namely damage. And the use of Certainty Factor in this system is to display the level of system confidence in the results of the diagnosis in the form of a percentage. So that it can convince the user of the diagnostic results.The results of the tests carried out, of the 20 trials by experts, 18 of them have conformity with the results of expert opinion. There are 2 unsuitable trials because the percentage of CF between the probability of damage 1 and 2 is the same, so there is a special case where if the CF percentage of the probability of damage 1 and 2 are the same, then the user can see the solution to the second damage in the Damage Encyclopedia. From the tests carried out, the Expert System with the Forward Chaining and Certainty Factor methods can detect damage to the guitar with an accuracy level of matching the results of the system with expert opinion of 90%.
Aplikasi Tes Kepribadian Online Berbasis Website pada Pusat Konseling dan Pengembangan Pribadi Universitas Kristen Petra Kevin Kevin; Justinus Andjarwirawan; Andreas Handojo
Jurnal Infra Vol 7, No 2 (2019)
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The need for an introduction to one's own personality is needed, especially to know who you are and can help companies find out who will be recruited as employees. Today, there are several sites that offer to be able to work on personality tests directly. However, the results of the tests that have been done can only be seen for one time only, so the test data that has been obtained cannot be stored for documentation purposes.To help users know their personality correctly and intact, a personality test application is created that can display test results that are in accordance with the user's personality and can save the results. Through this application, users can know who they are and the company can easily get to know the user's personality correctly. Existing tests include Myers-Briggs Type Indicator, Temperament Test, A / B Personality Type Test which has different test results or information. So that users and companies need to choose which tests are suitable for their needs.The test results show that this personality test is able to answer the user's needs for correct and complete personality recognition. In addition, the results of the tests that have been taken and worked on can be saved either by the user or by the company with different formats according to the needs. So that both users and companies can save these results to be documented in various formats according to their needs.
Implementasi Internet of Things Untuk Menjaga Kelembaban Udara Pada Budidaya Jamur Aligia Ricky Agusta; Justinus Andjarwirawan; Resmana Lim
Jurnal Infra Vol 7, No 2 (2019)
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Internet of things in a broad sense makes everything in the world connected to the internet that is connected continuously. The internet of things can control, send data, and so on that uses the internet so that it can be done remotely without knowing distance. The current implementation of air humidity control is still done by feeling directly through human skin and then will do the fogging if the humidity is felt lacking. With the internet of things, it can be implemented to control air humidity remotely through the website. To make the air humidity controller needed a tool such as humidity sensor and air temperature SHT11, microcontroller, relay, sprayer. The website uses the website for the interaction of humidity and air temperature sensors, microcontrollers, or other tools through the internet. This website is used to facilitate users to access the internet anywhere and use devices that are able to open websites. Website created using php. The microcontroller used is WeMos D1 R2 which has ESP8266 in it. The final result of the development of this air humidity controller is that the microcontroller can send data from the sensor to the web server, air humidity that matches the setpoint. Users can view daily humidity and air temperature charts.
Implementasi Web Service Integrasi Data Penelitian dan Pengabdian Masyarakat dengan SISTER Ristekdikti dengan Metode REST Lettisia Apriolita Harjono; Leo Willyanto Santoso; Justinus Andjarwirawan; Resmana Lim
Jurnal Infra Vol 8, No 2 (2020)
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Every universities is obliged to apply research and community service. Based on data frm the official website of Ristekdikti, the number of lecturers at universities in Indonesia is very large, so we need a system to collect data and manage lecturer data. With so many data held by the lecturer, the data collection becomes ineffective when having to retype it. Therefore, a program was made to help lecturers to collect research and community service data through data that was already in the university’s information system. This research uses a web service that has been provided by SISTER Ristekdikti. The method used is Representational State Transfer (REST). Data from the university is about research and community service. Input data must be mapped first to fit the required data. The program of this research will provide the success of adding data to SISTER Ristekdikti. The test result of the research program show that the data has been successfully entered into the SISTER Ristekdikti mirror database. From the results of the questionnaire obtained the results that the overall application is good with an average value of 2.7. In addition, the application helps lecturers to complete P2M data and the data displayed in accordance with needs with an average value of 3.
Sistem Presensi Mahasiswa Berbasis Animated QR Code Menggunakan Raspberry Pi Michael Anggreawan Alexander; Justinus Andjarwirawan; Indar Sugiarto
Jurnal Infra Vol 8, No 2 (2020)
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Now the use of technology in the field of information systems technology has expanded more widely in all fields, including in educational institutions. The current presence system that is currently running on the teaching and learning system in several educational institutions still uses conventional methods. This causes need more time in the presence process. Previous research has implemented a QR Code added to the Mobile System application. Presence features using the QR Code can be found on the Schedule and Absentee menus. The presence will automatically follow the number of meetings that have been conducted.So with this description will be done designing and creating a presence system workflow with optimizing QR Code that is equipped with Animated, so that it can run using the Android application and using the Raspberry Pi 4 system which is equipped with a camera to read the Animated QR Code, where the student data will be sent to the database using Internet connectivity.Based on the results of tests that have been done, students managed to get an Animated QR Code as presence data by logging in to the application that is incorporated in the Internet network and storing the presence data in the Database. Raspberry Pi Camera is able to read Animated QR Codes from the Android application by taking a few seconds using Raspberry Pi 4. Facilitates students in making presence using an Android-based application.
Aplikasi Notifikasi Telegram Untuk Mengetahui Trend Forex Trading Dengan Menggunakan Pola Japanese Candlestick Ricky Kuncoro; Agustinus Noertjahyana; Justinus Andjarwirawan
Jurnal Infra Vol 8, No 2 (2020)
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Forex Trading is a business that promises high profit and freedom such as not needing big capital and a physical office. However, the reality is that not every trader can take a satisfying profit because of not realizing changes of trend direction in a market. Because of that, there needs to be an application that is capable of telling when there will be a change of trend direction on the market in real-time so that a trader can maximize the potential to take advantage of a large amount of profit.Expert Advisor is used as a reading of a change of trend direction automatically and inside it has a method to read the direction of market trend, which is called Japanese Candlestick. There are many types of Japanese Candlestick Pattern that already exist however in this research there will be 4 patterns that will be used, which are Hammer Pattern, Doji, Engulfing, and Custom. Then, Telegram will be used as chatbot to notify users of a change in trend direction.Testing result has proved in EUR/USD currencies in time frame H4 that the application that was made was capable of reading reversal trend of average 44,76% and continuation trend of average 67,60% in three years. To deliver the notification on Telegram, Expert Advisor will generate the reading of trend direction using Japanese Candlestick in file form for the chatbot in Telegram which will use Python programming language to get the file. Then the  chatbot will read and send the file of the reading result in  notification form to Telegram users.
Penggabungan Algoritma Markov Chain Monte Carlo dan Metode Statistik pada Named Entity Recognition Lintas Bahasa Suku di Indonesia untuk Pembelajaran Alkitab Vania Putri Minarso; Henry Novianus Palit; Justinus Andjarwirawan
Jurnal Infra Vol 8, No 1 (2020)
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Bible is an important bilingual or monolingual text, making it a resource for training such as translation, named entity analysis, and transliteration. Named entity is a realworld object such as people, location, organization, product, et cetera, that can be symbolized with an exact name. The objective of the experiment is to help people learning the bible in understanding important names in the bible either in Indonesian or other local language in Indonesia. This can also help missionaries doing evangelism to quickly understand named entity in the local language of the place they are in. In this process, they may be a gap exists between the named entity in Indonesian and the local language.To solve this issue, designed an application that integrate Markov Chain Monte Carlo algorithm that wrapped inside efmaral tool with statistical method wrapped inside giza++ tool, and IBM Model 2 reparameterization wrapped inside fast align tool. From the product of all the tools, which is correlation between every word in Indonesian with the word in the local language, the result will be decided by finding the right consensus to find the correct named entity in the local language. The named entity will be chosen based on the strong numbering from the original language.Based on the result of the experiment, integration of efmaral, giza++, and fast align tools yields better accuracy than efmaral tool alone. Efmaral tool has the accuracy around 0,07 to 0,66. Giza++ tool has the accuracy around 0,47 to 0,90. The integrated tools (efmaral, giza++, and fast align) has the accuracy around 0,36 to 0,87.
Implementasi Accelerated Mobile Pages Untuk Sistem Informasi Manajemen Berbasis Web dan Absensi Pada Program Pendidikan Bahasa Universitas Kristen Petra Stephen Lukas Wijaya; Justinus Andjarwirawan; Silvia Rostianingsih
Jurnal Infra Vol 7, No 2 (2019)
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Management Information System has become one of the mediaused to facilitate the administration, storing and viewing dataquickly and easily through Web. Nowadays, manualadministration requires more and less efficient resources,causing human error to affect important data.To answer the issue, a management information system is neededby utilizing website-based technology , assisted by AcceleratedMobile pages on the main page .By utilizing this technology, awebsite can be easily opened even in a slow internet connection.In addition, the presence of the website as a media managementinformation system facilitates the management of data, theadministration process of all parties in need in the languagecourse.From the research and testing systems that have been made, theapplication can help facilitate the process of administration anddata management. From the results of the questionnaireconducted on 10 respondents, the level of satisfaction with theprogram reached 3.1 on a scale of 4.
Aplikasi Android untuk Mencari Harga Tiket Pesawat Termurah dari Beberapa Situs Travel di Indonesia Bobby Irawan; Henry Novianus Palit; Justinus Andjarwirawan
Jurnal Infra Vol 7, No 2 (2019)
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Travel sites in Indonesia offer varied flight ticket prices. So, to find a cheap price becomes difficult, consumers must open every site or application from a travel site to compare the ticket price each site offered. This takes a lot of time, and sometime when you find the right price and want to order it, the ticket sold out. Therefore, an application is needed to search and compare prices from each travel sites. Application was made to do the comparison of price that each travel sites offered. To do a comparison, a server is needed to retrieve each price and details of flights on each travel site. After that, the process continue to processing all data and displayed it to the application.Based on the result of test that been done on program, program managed to collecting, processing, and showing price as well as flight information from travel sites.
Penerapan Algoritma TextRank dan Dice Similarity Untuk Verifikasi Berita Hoax Christian Khontoro; Justinus Andjarwirawan; Yulia Yulia
Jurnal Infra Vol 9, No 1 (2021)
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Hoax or in Indonesian, hoax is fake news or news that has no source. Hoax are a series of information that is misguided, but sold as truth[5]. The problems above are the basis for creating a verification system for this hoax news. The TextRank and Dice Similarity algorithms will be used to help verify the inputed news is a hoax or fact. Where in this study, the TextRank algorithm is used to find the most important keywords in a news which will then be used to become keywords in search engines. Then the Dice Similarity algorithm is used to measure the level of similarity of the news entered with the news obtained from search results on search engines. The hoax verification system that has been done has been tested using several similarity weights to find which similarity weights are the most optimal. The data used were 50 hoax news and 50 fact news. From this test, the optimal similarity weight is 40% with an accuracy of 84%. With details of 50 hoax data, 47 news were declared hoax, 2 news items were declared facts, and 1 news was declared unknown. Of the 50 fact news, 37 news were declared facts, 13 were declared hoax, and no news was declared unknown.
Co-Authors Agustinus Noertjahyana Agustinus Noertjahyana Alexander Setiawan Aligia Ricky Agusta Alvin Nathaniel Tjondrowiguno Andreas Handojo Andreas Wijaya Kangnata Antonius Wibisono Billy Gracia Bobby Irawan Bryant Plaudo Santoso Christian Khontoro Daniel Valentino Hidayat Daniswara Kusuma Aji Djoni Haryadi Setiabudi Elvan Alandi Fernando Febrianto Henry Novianus Palit Howard Christopher Yoel Unsong Igor Maha Putra Indar Sugiarto Janthake Decuellar Jemima Ciani Setiawan Joshua Allan Saputra Kevin Christian Kevin Kevin Kristian Suryajaya The Lauw Hermawan Pratama Lauwoto Leo Willyanto Santoso Lettisia Apriolita Harjono Lily Puspa Dewi Marvil Dondokambey Maximillian Christianto Michael Anggreawan Alexander Moses Gregoryan Ndolu Eoh Nico Gufron Nirwan Jaya Suwarno Resmana Lim Resmana Lim Ricky Kuncoro Rolly Intan Rudy Adipranata Silvia Rostianingsih Stephen Lukas Wijaya Vania Putri Minarso William Chen Yulia Yulia