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Alexander Setiawan
Program Studi Informatika
Computer Science & IT

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Aplikasi Toko Online Dengan Chatbox Pada Toko KCA Kevin Christian; Justinus Andjarwirawan; Alexander Setiawan
Jurnal Infra Vol 8, No 1 (2020)
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Abstract

Along with the development of technology, many people are selling online. Many people who sell online in the marketplace or have a personal website to sell. But often the problem faced by sellers and consumers is ineffective communication because the media to communicate is only limited to one or two media so that consumers often become disappointed because they are waiting for a long response. To overcome this problem, an online store application is created that can make sellers and buyers communicate with several kinds of media to communicate. The feature is that the seller can receive and send messages to the seller through several social media options available, for example Whatsapp. And in order to maintain the security of buyers when transacting websites using payment gateway services from Midtrans that provide payment methods including card payments, bank transfers, direct debit, e-wallet, over the counter, and others.The end result of making this program is an online store application, which has communication features via email to social media. The conclusion obtained from making this program is that the program is feasible to use, and the store application communication features and payment can run well.
E-Vote Menggunakan RFID Sebagai Login Key Untuk Pemilihan Ketua Organisasi Universitas Kristen Petra Berbasis Web Daniswara Kusuma Aji; Justinus Andjarwirawan; Alexander Setiawan
Jurnal Infra Vol 7, No 2 (2019)
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Abstract

Voting or more commonly called voting is one method that is used by humans to make choices, decisions in a matter. In Indonesia alone voting is often used in the election of leaders such as the president, student council president and at the head of the organization. In the election in Petra itself there were many problems such as ballot paper folds for voting, long time duration on vote preparation and vote counting. In this case, the most affected by this problem is the election committee because it takes a long time and preparations with a lot of labor needs have not been added to by human error which can cause loss to many parties. It can be concluded that the problem is how to vote by using paper that is efficient and does not take a long time and how everyone only makes one vote once.To answer this problem, an electronic voting system was designed using rfid and also website-based thermal printer and barcode technology. By using this technology, each voter will get a receiptthat will be entered into the ballot box so that it can be re-audited if needed. In addition, this resolves the problem of inefficient paper use and reduces the burden on the election committee. voting must be regisified first and will be checked whether the voter has voted or not.
Aplikasi Monitoring Aktivitas Layar Komputer Dengan Studi Kasus Lab Praktikum Kelvin Yohanes; Lily Puspa Dewi; Alexander Setiawan
Jurnal Infra Vol 9, No 2 (2021)
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Abstract

Computer Screen Activity Monitoring Application is an application that used to help supervisors or lecturers or laboratory officers when supervise practical activity, in this case Multimedia (MM) laboratory. With this monitoring application, can capture screenshot of student’s computer without known by the student. So that supervisors or lecturers or laboratory officers can be assisted in supervising practical activities. For the implementation and the usage of this application at MM laboratory, there are two main entities, namely admin or lecturer’s side and client or student’s side. On admin or lecturer’s side, there are user interface and place that used to store screenshot of student’s computer screen. So, on admin or lecturer’s side, can see the screenshot image of student’s computer screen at certain period. On client or student’s side, there are no user interface, because on it’s side, only has background process. This background process only capture screenshot at certain time, then send it to admin or lecturer’s computer. So, admin or lecturer can see the result of captured screenshot from student’s computer. The result of this test shows that this application was running as expected. Background process that’s installed on student’s computer successfully capture screenshot image and send it to admin or lecturer’s computer. Other than that, on admin or lecturer’s side, can see the result. When testing the implementation of this application on MM laboratory, there is a little trouble. The trouble is on Firewall configuration that cannot connect between admin or lecturer’s computer and client or student’s computer. This research can be developed by making other platforms besides Windows, because apart from the MM lab, there are computers with operating systems other than Windows.
Aplikasi Penyaluran Sampah Anorganik Non-Residu berbasis Android Daniel Christian Tedja; Alexander Setiawan; Lily Puspa Dewi
Jurnal Infra Vol 8, No 1 (2020)
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Abstract

Environmental pollution is increasing every day along with the increasing number of products and consumption behavior of the society in general. Things that must be done to overcome the increase in the volume of waste are to reduce the production of waste, especially inorganic types because it is very difficult to decompose and increasing society awareness to dispose of waste. Viewed from these two aspects, society need a system that is able to give them encouragement to dispose of wasteThe Android-based non-residual inorganic waste distribution application intended to help the owner in raising public awareness to dispose of waste, especially non-residual inorganic type. This application will be made using the Java programming language using Android Studio. This android-based application helps the admin to add as many drop post as possible so that it can reach the people in the city of Surabaya evenly. In addition, this application also records the submission process that has been confirmed by the confirmator also picked up waste by the courier so that the admin get the waste collected data.The test results show that this application runs well on devices with Android 7.1.1 (Nougat) but does not run well for Android 4.4.3 (KitKat) because some features can only run on Android 7.0.0 (Nougat) and above. This application runs the waste submission feature, the addition of the drop post, the notification feature, displays submission information, chat feature, and the navigation feature that makes it easy for the society to use the application so that it is expected to encourage the society to dispose of their inorganic waste.
Pencatatan dan Penghitungan Skor Pada Olahraga AAIPSC dengan NFC Berbasis Android Satria Antoni Gunawan; Silvia Rostianingsih; Alexander Setiawan
Jurnal Infra Vol 7, No 2 (2019)
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Abstract

Recording and Calculation of Scores in AAIPSC sports requires speed and accuracy both in terms of accessing and inputting data. At this time, recording is done through paper, so the time taken to enter the calculation software takes a relatively long time. The author hopes that the application created can speed up the calculation and data can be stored to SQL server. With NFC as a validation system, it is hoped that data validation can be maintained at the time of inputting.
Perbandingan Character Recognition dan Text Recognition Menggunakan Extended MNIST dan IAM Database dan Tesseract pada Tulisan Tangan Ijazah Made Yoga Mahardika; Kartika Gunadi; Alexander Setiawan
Jurnal Infra Vol 8, No 2 (2020)
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Abstract

The problem with handwriting is how a technique can recognize various types of writing in various forms. Different from computer letters that consistent, each human’s handwriting is unique in the form and consistency. These problems can be found in ijazah documents where the data is handwriting.Data location segmentation uses run length smoothing algorithm with dots as segmentation features. Handwritten text recognition (HTR) technique requires data segmented into words. Handwritten character recognition (HCR) technique requires data segmented into characters. HCR uses the LeNet5 model with the EMNIST dataset. HTR uses tesseract tool and convolutional recurrent neural networks with the IAM database.Experiment on 10 samples of scan images, segmentation obtained an average accuracy of 95.6%. The HCR technique failed in the letter segmentation process in cursive handwriting. The best technique is the HTR with tesseract tool managed to get word accuracy above 69% tested on 5 scan samples, 15 data fields.
Pembuatan Program Absensi Sidik Jari untuk Bagian Pergudangan PT. Puji Surya Indah Hans Sebastian Thenady; Alexander Setiawan; Agustinus Noertjahyana
Jurnal Infra Vol 7, No 2 (2019)
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Abstract

Employee’s productivity could affect the performance of a company, so it must be considered & maintained. One way to maintain the employee’s productivity is by monitoring the employee’s performance through their attendance. But, it also requires the right tool to prevent the forgery of attendance data input by employees. For example, if you use a timestamp machine, the company’s employees can fake data on their absences by entrusting the attendance card (to be stamped) to their colleagues. Therefore, an attendance program that is assisted by using a fingerprint machine, will be designed to help the company maintain the productivity of the employees of the Puji Surya Indah company. This attendance program consists of a user interface, which will be created using Visual Studio 2017, with the Visual Basic programming language. In addition, a database was also established to store employee, user, and attendance and payroll data, using MySQL. The final result of making this program is an attendance program, which can store personal data of employees, user data, along with attendance reports and employee’s salaries. The conclusion obtained from the making of this program is that this program is feasible to use, but still needs to be added features and justify the way the data is displayed; overall, this program gets scores of 66.6% good and 3.33% adequate from respondents.
Power Meter Monitoring Dengan Mobile Apps dan Metode Direct Calculation Kevin Wibisono Lokananto; Resmana Lim; Alexander Setiawan
Jurnal Infra Vol 8, No 1 (2020)
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Abstract

Electricity is a basic need that is still not optimal in Indonesia, and  the waste of electricity in Indonesia which is quite large, therefore with this tool can help to save electrical energy, but it can also monitor the burden attached to the tool can help manage financial because this tool displays total usage and total price.The tool that I made consisted of several main components such as the Arduino microcontroller, the ZMPT101B voltage sensor module, the ACS712 30A current sensor module. From the installed load, the data in the form of voltage and current will be read by the sensor and sent to the microcontroller for calculation.The calculation results will be uploaded to Firebase, which later will be fetched and showed by the Android application, The application will also be equipped with other features such as, on-off switch, reset, history,setkwh and total cost .
Aplikasi SmartRoom Berbasis Blynk untuk Mengurangi Pemakaian Tenaga Listrik Richard Prayogo Gozal; Alexander Setiawan; Handry Khoswanto
Jurnal Infra Vol 8, No 1 (2020)
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Abstract

This study aims to create a Blynk-based application as a controller for SmartRoom to reduce unnecessary electricity usage. As for the background of this writing because today almost all activities that humans do everyday are related to electricity usage. But there are also many people who use electricity powerfully. This excessive use of electricity can cause energy waste and increase electricity costs. With increasing electricity usage, savings can be made by turning off lights or electrical appliances that are not used through the help of the Internet of Things through Blynk-based applications.The making of this application is made using the interaction between the microcontoler WeMos D1 R2 which is connected with sensors and modules to detect data to be processed for SmartRoom. For applications using Blynk which is connected to the system and used to make it easier for users to control devices that are connected remotely.The results showed that in a trial period of 1 week between normal conditions and the SmartRoom system resulted in a power savings of 28% and could be realized with a reliability level of 100%.
Aplikasi Segmentasi Pelanggan menggunakan Algoritma RFM/P dan Kmeans Clustering pada PT. XYZ Priscilla Delaya; Andreas Handojo; Alexander Setiawan
Jurnal Infra Vol 9, No 2 (2021)
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Abstract

Customers are one of the keys to the resilience of a business. Each customer has different behavior and needs, so they need different treatment. Intense competition in the retail business makes customers have many choices and can easily switch to other companies. As a solution for PT. XYZ to compete, a customer segmentation system is needed to help PT. XYZ understand and maintain their customer’s loyalty. Therefore, in this study, the RFM/P method was used to calculate customer value, which was then followed by Kmeans clustering to divide customers into three clusters, namely below zeroes, most growable customers, and most valuable customers for each product. The results of the questionnaire evaluation in system testing were carried out on 6 respondents, for application functionality 93% good, application design 90% good, ease of use of application 83% good, application responding to needs 90% good, and overall application 87% good.
Co-Authors Agustinus Noertjahyana Aldo Vallian Sayoga Tanu Wijaya Alex Christopher Alvin Santoso Amadea Sapphira Andreas Handojo Andri Gunawan Anita Nathania Purbowo Benediktus Marcelino Pratama Cynthia Stefanie Suriady Daniel Christian Tedja Daniswara Kusuma Aji David Filigon Lie Djoni Haryadi Setiabudi Endang Setyati Fandy Ong Febry Suryanto Gunawan Putra Pratama Handry Khoswanto Hans Sebastian Thenady Henry Novianus Palit Indar Sugiarto Jimmy Christian Tanian Jimrio Vicky Stanley Benu Juan Felix Nyoto Santoso Justinus Andjarwirawan Kartika Gunadi Kelvin Yohanes Kevin Christian Kevin Koesoemo Kevin Wibisono Lokananto Lauw Hermawan Pratama Lauwoto Leo Willyanto Santoso Lily Puspa Dewi Lucky Alexandre Lembangan Made Yoga Mahardika Michael Boentarman Michael Gozali Nova Sepadyati Priscilla Delaya Resmana Lim Resmana Lim Reyner Wijoyo Riandro Setiyo Louryanto Richard Prayogo Gozal Ricky Handoyo Rudy Adipranata Satria Antoni Gunawan Semuel Lesbassa Silvia Rostianingsih Vincentius Tandy Prasetyo William Winarto Yanes Robert Yeska Kakihary Yosua Umbu Datu Kadiwanu Yuan Pratama Yulia Yulia