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All Journal Pythagoras: Jurnal Matematika dan Pendidikan Matematika Journal of Indonesian Tourism and Development Studies INTENSIF: Jurnal Ilmiah Penelitian dan Penerapan Teknologi Sistem Informasi
Saputra, Agung Dwi
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Agriculture, Biological Sciences & Forestry Computer Science & IT Decision Sciences, Operations Research & Management Education Environmental Science Mathematics Social Sciences

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Implementasi Geometric Brownian Motion dalam Memprediksi Harga Minyak Mentah pada Masa Pandemi Covid-19 Seru, Feby; Suhendra, Christian Dwi; Saputra, Agung Dwi
PYTHAGORAS Jurnal Matematika dan Pendidikan Matematika Vol. 18 No. 1: June 2023
Publisher : Department of Mathematics Education, Faculty of Mathematics and Natural Sciences, UNY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/pythagoras.v18i1.49418

Abstract

Minyak mentah atau crude oil memiliki peranan yang vital dalam pertumbuhan ekonomi suatu negara, karena minyak mentah merupakan sumber energi penggerak perekonomian. Untuk menjaga kestabilan perekonomian, maka harga minyak mentah pada periode mendatang perlu diantisipasi dengan cara melakukan prediksi terhadap harga komoditas minyak mentah dunia. Salah satu model yang dapat digunakan untuk memprediksi harga minyak mentah dalam jangka waktu pendek adalah Geometric Brownian Motion (GBM). Tujuan dari penelitian ini adalah mengimplementasikan model GBM dalam memprediksi harga minyak mentah di masa pandemi Covid-19, serta mengukur keakuratan model tersebut. Pada penelitian ini, prediksi harga minyak menggunakan model GBM dilakukan dengan 50, 100, dan 1000 iterasi. Hasil yang diperoleh menunjukkan bahwa model GBM dapat bekerja dengan baik, dalam memprediksi harga minyak mentah di masa pandemi Covid-19. Hal ini ditunjukkan dengan nilai MAPE yang kurang dari 10%. Crude oil has a vital role in the economic growth of a country, because crude oil is a source of energy driving the economy. To maintain economic stability, the price of crude oil in the coming period needs to be anticipated by making predictions on world crude oil commodity prices. One of the models that can be used to predict crude oil prices in the short term is Geometric Brownian Motion (GBM). The purpose of this study is to implement the GBM model in predicting crude oil prices during the Covid-19 pandemic, and to measure the accuracy of the model. In this study, the prediction of oil prices using the GBM model was carried out with 50, 100, and 1000 iterations. The results obtained indicate that the GBM model can work well in predicting crude oil prices during the Covid-19 pandemic. This is indicated by the MAPE value which is less than 10%.
Development of Web-based Geographic Information System for Water Quality Monitoring of Watershed in Malang Rosyida, Novita; Dinira, Layta; Rusydi, Alfi Nur; Saputra, Agung Dwi; Setiabudi, Ginanjar
INTENSIF: Jurnal Ilmiah Penelitian dan Penerapan Teknologi Sistem Informasi Vol 6 No 2 (2022): August 2022
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/intensif.v6i2.17514

Abstract

Human activity and climate change significantly impact water quality, especially in Malang's watershed. This research aims to develop a web-based Geographic Information System (Web- GIS) for water quality monitoring in that watershed. The water quality data had been collected from Enviromental Office of Malang District and Malang City. Water quality in this application was determined using the STORET method, comparing water quality data to water quality standards according to Government regulation so that the water quality status at each monitoring point will be known. The total 57 monitoring points are visualized spatially in this application based on the sampling location plotted by Global Positioning System (GPS). The longitude and latitude coordinates of the monitoring location had been converted in GeoJSON using Quantum GIS (QGIS) software. Google Map API key was used to display a sampling location map on the website. Web-GIS application was tested functionally using a black box, compatibility, and usability testing. Based on the testing results, it worked correctly on Chrome, Edge, Mozilla, and Opera browsers for PC/Laptops and also for browsers on Android smartphones version 4 and above. The application could be appropriately used and efficiently based on usability testing results.
Design of RIVAL (Cari Travel Malang) Application as One Stop App Solution for Travel Reservation in Malang Rosyida, Novita; Saputra, Agung Dwi
Journal of Indonesian Tourism and Development Studies Vol. 8 No. 2 (2020)
Publisher : Graduate School, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jitode.2020.008.02.04

Abstract

Reservations can be interpreted as order transaction for place, ticket, or goods between business owners or service providers with consumers. In travel reservation, especially in Malang, people do some travel reservations manually. They reserve the travel by phone to the travel customer service or came to the travel office. Based on the problem, the author made an application called RIVAL (Cari Travel Malang) as one-stop app solution for travel reservation in Malang that runs on mobile platform with android operating system. In this design phase, application is still local or runs on the developer local server and runs online for application testing to several people. With this application it is expected that travel reservation that are initially carried out manually by coming to service provider, now it can be done anywhere. The results of the implementation and testing were given to eight respondents with several different versions of the Android operating system namely Android Lollipop, Marshmallow, Oreo, and Pie. It was found that the application runs well without any UI constraints or main functions in the application with additional data response obtained from the test questionnaire form that the application is easy to understand from the user interface, provided information, and easy to use. With this application, it is expected travel reservation in Malang can be done easily and efficiently.Keywords: Mobile application, reservation, travel application.
Co-Authors Alfi Nur Rusydi Christian Dwi Suhendra, Christian Dwi FEBY SERU Layta Dinira Rosyida, Novita Setiabudi, Ginanjar