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INDONESIA
Jurnal Infra
Published by Universitas Kristen Petra Surabaya
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Core Subject : Science,
Computer Science & IT
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Articles 58 Documents
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Search results for , issue "Vol 8, No 1 (2020)" : 58 Documents clear
Hotel Recommender System Menggunakan Metode Pendekatan Graph pada Dataset Trivago Ricky Sunartio; Henry Novianus Palit; Andre Gunawan
Jurnal Infra Vol 8, No 1 (2020)
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Abstract

Trivago is a global online application that provides service in searching for accomodations based on the user’s destination, and other specific filters such as price range, ratings, and available features. As an accommodation searching app, one of the major challenges that Trivago faces is providing a list of hotels that match the user’s preference, in order to increase the rate at which the user engages in a transaction. Trivago uses a recommender system that can deduce a user’s preference in a session, and displays a number of hotels that are considered suitable for that user. In an attempt to improve the quality of their system, Trivago works together with researchers from TU Wien, Politecnico di Milano, and Karlsruhe Institute of Technology, to conduct RecSys Challenge 2019 as an annual science competition under ACM Recommender Systems Conference.This paper is going to be focused on the use of graph-based models in creating a recommender system using Trivago’s dataset provided in RecSys Challenge 2019. Graph-based models have been proven to be fairly effective in dealing with time series data, as shown in a research that studied online shoppers’ behavior using graphs [3]. Baumann’s research has shown an increase in accuracy by 5 – 10% when using graph features in predicting whether an online shopper would purchase a product as compared to using traditional features.The graph-based model used in this research would be Markov Chain, a probabilistic graphical model. This research would test several Markov Chain models with varying length, depth, and order, measuring each model with a metric called Mean Reciprocal Rank (MRR) as per mentioned in the challenge. At the end of the research, it is concluded that the model that yields the highest MRR uses Markov Chain with length = 1, depth = 0, and order = 1.
Sistem Informasi Administrasi dan Computerized Maintenance Management System pada Perusahaan Persewaan Truk X Vincentius Tandy Prasetyo; Alexander Setiawan; Yulia Yulia
Jurnal Infra Vol 8, No 1 (2020)
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PT X is a truck rental service company in Surabaya. The purpose of making a website based administrative information system so that the owner can check and make real-time rental booking transactions, and can generate reports on orders, purchases, inventory, truck repair history are needed for the owner PT. X in making business decisions.Based on the results of this thesis research, it can be concluded that overall this program has fulfilled the needs of PT. X mainly on the function of calculating the cost of orders, updating the price of spare parts on the stock card when purchasing parts, calculating the cost of repairing trucks based on the total price of spare parts used, notifications of repair of periodic oil changes based on kilometers exceeding the next period kilometers.
Sistem Akses Kontrol Laboratorium Menggunakan Kartu Tanda Mahasiswa Alexander Prasetya Widodo; Resmana Lim; Lily Puspa Dewi
Jurnal Infra Vol 8, No 1 (2020)
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Attendance procces is a record of presence of student and teacher in a college courses. With this record of presence, the student can figure out how many courses he attented to. Combining technology and presence that currently use in laboratory, the goal is to elevate effectiveness in attendance procces in the laboratory and access to the laboratory and also to make student easier at attendance proccess and also minimalize the mistake that would be happen.Manually record the presence gradually left behind if the process isnt getting update soon. There by, the process need new technology that can make controlling and recording of laboratory use and can also be use to record the attendance for student that has course in that laboratory easier with usage of the device that called Radio Frequency Identification and Detection tag.This access control system of laboratory use Raspberry pi and have website. Access control system of laboratory connect directly with raspberry pi, magnetic door lock, and also rfid tag, making direct access control granted to people that had a right to use that laboratory with student idenfitication card.
Algoritma Branch and Bound untuk Driver Assignment pada Aplikasi Simulasi Taksi Online Arlynston Liadi; Andreas Handojo; Tanti Octavia
Jurnal Infra Vol 8, No 1 (2020)
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Online taxi is one of the developments in technology that is currently being used by the wider community. Online taxis also have positive impacts such as drivers and passengers can know each other's location accurately, passengers can see drivers and vehicle information accurately, and passengers can easily find transportation to travel to other places. However, in reality requests from passengers appear randomly in different locations, so we need an application that can optimize the assignment between drivers and passengers..Applications are made with the python, html, and javascript programming languages, with django as a framework, bootstrap 3 for the front end menu, the Google maps API to get time and distance, as well as the front end in the online map section, and mySQL as the database used.The end result of this application is an assignment for drivers and passengers using a web-based branch and bound algorithm that can minimize pickup costs and waiting times by calculating the total combination of mileage, travel time, and the number of trip drivers on an online taxi.
Game RPG Berbasis Jamur Pangan Lauw Hermawan Pratama Lauwoto; Alexander Setiawan; Justinus Andjarwirawan
Jurnal Infra Vol 8, No 1 (2020)
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With the development of open-source technology such as Android, it helps new learning media, namely games. Games can be used to introduce something that rarely know such like edible mushrooms. Therefore, so it’s expected that this game can introduce edible  mushrooms.The game application that will be made in the RPG genre runs on the Android operating system with the Java programming language. With the main theme based on edible mushroom,  which all characters in the game are related to edible mushrooms from characters to NPC enemiesThe results of the development of this game show that the game is not only an entertainment media but also can be a medium of learning to get to know something new.
Implementasi Enkripsi AES Cipher dan Discrete Wavelet Transform Dalam Metode Steganografi David Christ Antono; Henry Novianus Palit; Rudy Adipranata
Jurnal Infra Vol 8, No 1 (2020)
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The science of steganography leads to a branch of computer science that is about hiding data information in media that cannot be easily detected. There are many types of media for steganography. The most popular ones are digital images. Along with the development of the science of steganalysis, there is needs of a way to add security to the hidden data. With steganalysis, one can easily reveal existence of hidden data in media files. Therefore, this study seeks to answer the need for securing the data. The program is an application that is useful for securing hidden data. The function of this program is to encrypt data that will be hidden using the AES cipher method. By converting hidden data into ciphertext, even though hidden data can be taken its form is still in the form of text that cannot be read without using the key used to encrypt. This process involves data that will be hidden to be converted into ciphertext first and finally steganography will be performed using least significant bits. Not only that, the program will also compress stego image. From the results of the encryption, steganography and compression trials, the hidden image data can be retrieved using the key used during encryption. The hidden data does not experience loss of information because the process is carried out lossless. The hidden data has been compared with extracted data and produces unlimited PSNR values.
Rancang Bangun Sistem Pakar dalam Menentukan Resiko Penyakit Jantung Koroner Susangto Andi Putera S.; Silvia Rostianingsih; Kartika Gunadi
Jurnal Infra Vol 8, No 1 (2020)
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Currently, the use of expert system applications has been widely used by many people, and is supported by a very significant development. So it's easy to use by many people and has many benefits to support life today. With this application, ordinary people can easily learn the expertise of an expert so that it can be applied in everyday life. In this application, an expert system is applied to analyze the risk of a person to develop coronary heart disease and be able to do prevention as early as possible. In making this application, the programmer consulted experts (doctors) in making knowledge base (basis pengetahuan). Based on data test results, the application can work well and easily in its use. Application can provide good analysis results in diagnosing the possibility of cardiovascular disease using the parameters provided.Currently, the use of expert system applications has been widely used by many people, and is supported by a very significant development. So it's easy to use by many people and has many benefits to support life today. With this application, ordinary people can easily learn the expertise of an expert so that it can be applied in everyday life. In this application, an expert system is applied to analyze the risk of a person to develop coronary heart disease and be able to do prevention as early as possible. In making this application, the programmer consulted experts (doctors) in making knowledge base (basis pengetahuan). Based on data test results, the application can work well and easily in its use. Application can provide good analysis results in diagnosing the possibility of cardiovascular disease using the parameters provided.
Aplikasi Website Pemetaan Penyakit Demam Berdarah Menggunakan Metode Geographically Weighted Regression untuk Memprediksi Tingkat Penyebarannya di Surabaya Holiyed Hadi; Andreas Handojo; Siana Halim
Jurnal Infra Vol 8, No 1 (2020)
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Dengue Fever is the one of the most popular endemic illness in Indonesian.. In early 2019, East Java was recorded as the province with the most Dengue Fever cases in Indonesia, because of that the prevent action is needed to reduce the Dengue Fever cases in East Java. But, due to limitations to get East Java data, this research uses Surabaya data as a model, because it has more complete data.The aim of this research is mapping the Dengue Fever with Geographically Weighted Regression (GWR) method that give a local weighted in every independence variable such as rainfall, the number of rainy day in a year, temperature, and humidity, so that can give the more accurate output to prevent Dengue Fever in future.The Output of this research is Mapping with color that based on the distribution rate of  Dengue Fever in every puskesmas area in Surabaya, along with mapping the weights of each independent variable to determine which independent variable influences the determination of dengue fever patients in every puskesmas area in Surabaya. So that area, can do a prevent action from the output of this research.
Aplikasi Analisa Sentimen Pada Komentar Berbahasa Indonesia Dalam Objek Video di Website YouTube Menggunakan Metode Naïve Bayes Classifier Maximillian Christianto; Justinus Andjarwirawan; Alvin Nathaniel Tjondrowiguno
Jurnal Infra Vol 8, No 1 (2020)
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From the increasing interest of the people in Indonesia in the use of YouTube, this has triggered the emergence of content creators who choose YouTube as a medium for work. So that the content creators are competing to produce video works that can be enjoyed by YouTube users. Various methods are used by content creators to improve the quality of the video produced.The process carried out in this thesis is the process of processing raw data that has been collected from YouTube, before the training and classification process. The process of data preprocessing needs to be done to overcome the raw data that is varied and inconsistent so that it can affect the training process and the classification process. Data preprocessing conducted in this thesis includes Tokenization, Stopwords Removal, Stemming. The classification process is the process by which the classification algorithm is run on comments that are used as input data for comments.Applications used in scientific papers have succeeded in producing smoothing values, where the value shows that the comments belong to the classifications of positive sentiments, negative sentiments or non-Indonesian data.
Aplikasi Monitoring Aquarium untuk Mengurangi Tingkat Kematian dengan Menggunakan Arduino Kezia Kurniawati; Agustinus Noertjahyana; Handry Khoswanto
Jurnal Infra Vol 8, No 1 (2020)
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In the advanced era of globalization, fish care can be created using special system to monitor the aquarium. The system that  can be controlled via Android becomes one of the most comfortable to use. By using a microcontroller that is connected to the internet, it can monitor the aquarium using sensors in real time and automatically insert data into the database. Through the Blynk application, fish owners can adjust environmental conditions by entering desired requirements. You can monitor data obtained from sensors through a website that is directly connected to the microcontroller. The test is carried out in 2 different fish environments (no system environment and monitoring system environment).  The monitoring system in this study not only can monitors 4 parameters in the aquarium (feeding, water temperature, water level, and water pH) but also controls most of the parameters in the aquarium (except water pH). Based on the results of the study, the monitoring system environment has fish mortality rate of 20% with temperatures around 28 °C while non monitoring system environment has fish mortality rate of 50% with temperatures above 30 °C.

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