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Justinus Andjarwirawan
Program Studi Teknik Informatika
Computer Science & IT

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Aplikasi Pencarian Jurnal Ilmiah dengan Term Frequency-Inverse Document Frequency Amanda Tanari; Andreas Handojo; Justinus Andjarwirawan
Jurnal Infra Vol 7, No 1 (2019)
Publisher : Jurnal Infra

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Abstract

Kebutuhan seorang peneliti untuk mencari artikel ilmiah untuk dipelajari maupun sebagai pendukung penelitiannya tidak dapat dihindari. Artikel ilmiah yang kemunculannya pesat membuat jurnal ilmiah yang dicetak lebih lambat penerbitannya dibandingkan dengan website. Oleh karena itu, para peneliti dapat mencari referensi di website agar lebih mudah dan dapat melihat artikel yang terbaru. Namun, hasil pencarian dari artikel ilmiah juga bervariasi di setiap website dan urutan hasilnya terkadang tidak sesuai dengan yang ingin dicari.Penelitian ini mencoba menghasilkan hasil pencarian yang sesuai dengan keinginan pengguna berdasarkan kata kunci yang dimasukkan. Penelitian akan dicoba menggunakan metode Term Frequency-Inverse Document Frequency (TF-IDF). Pengurutan hasil pencarian mulai dari bobot terbesar yang didapat dari perhitungan TF-IDF.Aplikasi dapat menampilkan hasil pencarian yang cenderung relevan dengan satu term kata kunci, tetapi bila kata kunci merupakan phrase, maka hasil pencarian cenderung tidak relevan. Aplikasi pencarian jurnal ilmiah dengan metode term frequency-inverse document frequency ini dapat menjawab kebutuhan mahasiswa maupun dosen dalam mencari jurnal.
Penetration Testing Server Sistem Informasi Manajemen dan Website Universitas Kristen Petra Richard Pangalila; Agustinus Noertjahyana; Justinus Andjarwirawan
Jurnal Infra Vol 3, No 2 (2015)
Publisher : Jurnal Infra

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Abstract

A developing organization need information technology in itsoperational activity. However what is often considered is how toensure that data saved in server is safe from unauthorized parties.Therefore, this thesis reviews how a person who is appointed as asecurity analyst do penetration testing in a system with variety toolsgiven and how the report can be understood from by people frommanagers to programmers. Besides giving the how-to knowledge,this thesis also reviews how secure is the organization under reviewin keeping their data safe from other parties who are not supposedto get access to important operational activity data.
Indexing dan Searching Document Menggunakan Metode Semantic Suffix Tree Clustering Berbasis Android David Valentino; Adi Wibowo; Justinus Andjarwirawan
Jurnal Infra Vol 5, No 1 (2017)
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Abstract

Anroid smartphone device has been involved in user’s way of living in this modern era. Smartphone device is used in user’s daily activity such as reading and storing electronic document in Pdf, Word and other file formats. User might and frequently forgot elctronic document’s directory in the smartphone.This research aims to help user to find documents that reflect user’s keyword semantically or literally. Documents that reflect user keyword semantically or literaly will be shown. Various method is tested to minimize time use in clustering using suffix tree to semantic searching processes.This research finds that user could find documents in the smartphone that reflect user’s keyword. Average time use for clustering about 100 documents containing 1000 word for each document is 686.7 seconds. User is able to search for document right after clustering process is done. Average time use for document searching is less than 2 seconds. Hence, thread implementation for processes decrease time consume greatly and the search result displayed to the user represents document content semantically.
Pembuatan Prototype Aplikasi Pengenalan Logo Berbasis Android Ferry Tanggo; Justinus Andjarwirawan; Ibnu Gunawan
Jurnal Infra Vol 2, No 2 (2014)
Publisher : Jurnal Infra

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Abstract

Today many manufacturers are competing to introduce their products. This triggers creativity in advertising. These ads are made in a variety of formats, ranging from print, video or any other media. But with the advent of various media formats of this ads, there is also a variety of constraints. One problem is that operating costs are also high enough to affect the price of the product is higher as well. The workings of this application is to scan the logo image objects and sent to the server for processing. The results of the process will be immediately sent back to the user of smartphones in the form of image information. Another function is to share information about the logos to others by using social media which connected with the internet. Based on the test results, the application can perform object recognition in the form of logos and displays related information. Accuracy of the normal scan success of 68.75%, accuracy in dim state of 0%, on a slope of 5 ° -30 ° by 60%, on the state of the logo is cut off by 20%, in landscape orientation by 40% and the small logo by 20%. Users can also add logos and information needed, and can also interact with other users through the comment feature.
Aplikasi Mobile Untuk Sistem Presensi Dosen dan Karyawan Universitas Kristen Petra Melinda Christy Roedyanto; Justinus Andjarwirawan; Agustinus Noertjahyana
Jurnal Infra Vol 7, No 1 (2019)
Publisher : Jurnal Infra

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Abstract

In carrying out daily activities, employees need to do attendance, which is one of the requirements for the salary calculation process. Presence is the level of attendance of employees regarding responsibility. Every permanent lecturer and permanent employee of Petra Christian University always makes a presence when entering and when returning. In attendance attendance records, there are many found in attendance data that is empty (not recorded) or twin during the recapitulation process at the end of the period. This happens because there are employees who forget, feel they have attended, or are not sure whether the presence data has been recorded or not. So that employees make a presence again to ensure that their attendance data is recorded.At this time, to check the attendance data, the employee must enter protal sim.petra.ac.id first. Then every time you enter, the employee needs to fill in the username and password for the login process. This is a matter that is considered less practical and efficient. Because only to check attendance attendance every day, employees need to enter the portal and login first.With the creation of mobile applications, it can make the checking process more practical and efficient. Employees only need to log in at the beginning when they first download the application. In the application there is also a graph of attendance calculations within an interval of one week. The graph is intended so that employees know whether in one week the employee is exposed to the presence limit or not. In addition, it can also be used to remind employees if on the previous day, attendance data was empty, the time of arrival and the time of return. If this happens, the employee can also submit a manual presence submission to the application.
Penerapan Sistem Channel Management untuk Aplikasi Manajemen E-commerce pada Pemilik Toko Online Multi Channel Anthony Santoso; Justinus Andjarwirawan; Anita Nathania Purbowo
Jurnal Infra Vol 7, No 1 (2019)
Publisher : Jurnal Infra

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Abstract

Ekonomi digital di Indonesia sangat berpotensi untuk terus tumbuh, yang dilihat dari tahun-tahun sebelumnya dan perkembangan teknologi yang semakin pesat. Hampir setiap orang di kota-kota besar pernah melakukan belanja online. Hal ini merupakan peluang bagi penjual toko online untuk dapat berlomba-lomba mendapatkan pelanggan dengan membuka toko di setiap platform e-commerce. Penjual yang memiliki banyak platform toko online juga mendapatkan manfaat yang menguntungkan bagi penjual. Penjual dapat menjangkau pelanggan-pelanggan yang setia pada satu e-commerce, tidak hanya itu saja penjual dapat menciptakan brand nya sendiri.Aplikasi ini dibuat dengan tujuan memudahkan penjual mengolah barang jualannya. Setiap penjual yang memiliki stok barang, harus memantau stok barangnya agar tidak terjadi stockout. Penjual yang sebelumnya harus memantau, mengganti, dan mencatat pada tiap platform e-commerce. Dengan menggunakan aplikasi ini penjual tidak perlu repot untuk memantau, mengganti, dan mencatat stok barang, karena aplikasi ini mengganti stok barang pada setiap platform e-commerce jika ada barang pesanan masuk. Selain itu aplikasi ini dapat mengubah atribut-atribut pada barang seperti harga dan stok, sehingga barang dapat dikontrol dengan mudah.Aplikasi ini bekerja dengan cara menyimpan data-data barang yang diambil secara otomatis menggunakan tools Curl. Setelah itu data yang diambil dari tiap e-commerce selanjutnya diolah dan dimasukkan dalam database. Data yang sudah masuk nantinya diolah dan dipantau ketika ada perubahan. Selain itu aplikasi ini secara otomatis mengirimkan data terupdate jika ada perubahan dalam data e-commerce.Channel Management dapat diterapkan pada aplikasi dengan cara melakukan web crawling pada e-commerce dan mengolah data yang didapatkan untuk bisa diolah dan membentuk sebagai channel manager. Data yang dapat diubah oleh program dilakukan dengan metode POST pada e-commerce yang bersangkutan. Statement POST didapatkan melalui analisa pada kasus nyata e-commerce. Adapun kekurangan dari POST adalah banyaknya variabel yang dibutuhkan. Dalam pembaharuan barang, program menggunakan trigger daripada email dan waktu. Menurut hasil pengamatan hasil dari program ini dianggap dapat membantu walaupun masih kurangnya tampilan yang bagus.
Pembuatan Web Pembanding Fashion Wanita Yvonne Nathania; Justinus Andjarwirawan; Silvia Rostianingsih
Jurnal Infra Vol 4, No 1 (2016)
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Abstract

The development of today's fashion world has increased. The number of sellers who sell clothes online through social media be a sign that the fashion world today has grown. Besides through social media, online shopping sites also sell a wide range of fashion products with items, brands and prices vary. The number of different types of items that make the customer the trouble to compare the prices item.. Therefore, in order to facilitate the customers to compare prices between items especially women's fashion, it is necessary to form a portal site that is able to collect a variety of information contained in this online site among Lazada, Zalora, and Tokopedia. the information in the form of price, items name, product description and origin of the site.The system has the ability to scrape data from Tokopedia, Lazada and Zalora using web scraping and web services. User can easily compare between products and systems also provide a simple recommendation system price comparison of the products being compared.Overall the systems can help users to compare between women's fashion and display products with lowest price. System also can display search results according to the keywords entered by users. In the process of data collection, web scraping takes longer time to retrieve data than data retrieval using web service.
Aplikasi Pendeteksi Unsur Hinaan dalam Komentar di Media Sosial Berbahasa Indonesia Yohanes Adam Sastrodikoro Wiryoadikusmo; Henry Novianus Palit; Justinus Andjarwirawan
Jurnal Infra Vol 6, No 1 (2018)
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Abstract

Communication in social media has became a lifestyle of Indonesian people. Most of the kind of communication between users are commentary text. Often there are comments that contain elements of insults directed at others. Detection of insult elements in comment text in social media is needed.The first step in the method is to normalize the text so that the comment text is more organized and standardized. The replacement of the insult verbal variation into the original insult word is also done. Then do the stemming process to take the basic word of each word. By performing feature extraction of the text, obtained every feature of the text is then predicted using the SVM method.The application used in this paper successfully detected insulting elements in the text of comments from social media using the three methods of SVM classification, Logistic Regression, and Naive Bayes.
Perancangan dan Pembuatan Aplikasi Pembelajaran Tata Surya untuk Anak SMP Berbasis Android Irawan Hady; Justinus Andjarwirawan; Silvia Rostianingsih
Jurnal Infra Vol 3, No 2 (2015)
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Abstract

Learning is a concept that reflects the learning process. Solar System is a collection of celestial objects which consists of a massive star called the sun, and all objects that surround it the objects are planets, satellites, asteroids, comets and meteors.Technology in learning has changed the way learning is different from the traditional learning process conducted by face-to-face interaction between teachers and students, so that technology in learning is defined as a medium for distributing information. Learning application can help the learning process to be innovative, interesting, and more interactive. In addition the process of learning can be done anywhere and anytime, and can increase student interest.
Aplikasi Crowdsource Pencarian Jasa Fotografer Videografer Berbasis Android Cenius Sanjaya; Silvia Rostianingsih; Justinus Andjarwirawan
Jurnal Infra Vol 6, No 2 (2018)
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Abstract

As technology grows and becomes more sophisticated, the impact will make it easier for humans to search for anything they want. Searching for services in photography and videography fields is still essential. From people's perspective in searching of services, the minimum information about quality of service providers makes clients hesitate to use the service. From the provider's perspective the problem is the offered price from service searchers doesn't fit the provider's criteria and the slow payment system makes the provider feel disadvantageous.To solve the problem, an android based application is made. This application has features such as record, rating and review where it helps the provider to show the quality of the jobs that have been done. Also it has portfolio features with auto watermark that supports the quality of the service provider so it won't be claimed by any irresponsible party. Then the bid feature also helps service searcher to get the best price which matches the maximum budget they have and enables the service providers to freely offer their best price for the searchers. Payment system in this application uses third party where the user will pay to application and if it's finished the admin will transfer it to the service provider.After getting through the testing phase, the application can help the searcher to look for service provider with the best price and quality that's trusted and well-known. This app as a whole is scored 84% from respondents.
Co-Authors Adi Setiawan Adi Wibowo Agnes Yustivani De Sirat Agustinus Noertjahyana Aldi Renaldi Gunawan Aldio Tripadana Alexander Setiawan Alvin Nathaniel Santoso Amanda Tanari Andreas Handojo Andrew Agatha Andrew Samuel Anggiat Cokrojoyo Anita Nathania Purbowo Anthony Santoso Ariani Kartika Suwignyo Bernardo Taufiq Mangunwijaya Bobby William Therry Cenius Sanjaya Daniel Satriautama David Harjowinoto David Valentino Deryan Thimoti Yudianto Devi Christiani Angir Djoni Haryadi Djoni Haryadi Setiabudi Dwijaya Kongky Salim Eko Bayu Kusumo Eric Prabowo Cundomanik Fenny Destasia Chan Fernando Irawan Ferry Tanggo Gladys Clarisa Tamyn Greffika Exstrilia Gregorius Satia Budhi Hans Aditya Admaja Hans Christian Herjanto Harris Boedijono Hartono Jefton Henry Novianus Palit Ibnu Gunawan Ignatius Christian Indah Beatry Feysilya Lusi Indra Thamrin Irawan Hady Joseph Pranata Onggo Sanusi Joshua Ginove Hertanto Wijaya Julio Christian Salim Kartika Gunadi Kelvin Hartanto Kessy Hofany Kevin Fidelis Kristo Radion Purba Kristoforus Gumilang Kurniawan Atmodjo Leo Willyanto Liem Kevin Christian Halim Liliana Liliana Lily Puspa Dewi Maggie Mauri Tanuwijaya Malvin Yuwono Kurniawan Melinda Christy Roedyanto Michael Christian Tjandra Pieter Sindu Wijaya Putri Belina Tandra Rendy Cahyadi Resmana Lim Reyviano Marcyan Luhulima Ribka Kwandana Richard Pangalila Robby Christianto Wijaya Robert Gosal Rudy Adipranata Rufus Dian Oeinata Septian Jati Winayaka Silvia Rostianingsih Stevie Suwanto Putra Sugeng Hadi Wijaya Teguh Santosa Timotius Revelano Saliby Djohan Tommy Jonathan Viky George Lettu Radja Pono Wahyu Ricky Handoko Willy Santoso Wong Fanny Christiana Wu Alvin Hardy Yohan Alvin Limanto Yohanes Adam Sastrodikoro Wiryoadikusmo Yulia - Yulia Yulia Yvonne Nathania Zaguar Rigil Saputro