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All Journal JURNAL MATEMATIKA STATISTIKA DAN KOMPUTASI BAREKENG: Jurnal Ilmu Matematika dan Terapan Martabe : Jurnal Pengabdian Kepada Masyarakat MES: Journal of Mathematics Education and Science Journal of Science and Technology Mathematics and Applications (MAp) Journal
Rianjaya, Ilham Dangu
Universitas Islam Negeri Imam Bonjol
Agriculture, Biological Sciences & Forestry Arts Humanities Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Mathematics Mechanical Engineering Physics Social Sciences Transportation

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Journal : Journal of Science and Technology

 1 
Penerapan Model Seasonal Autoregressive Integrated Moving Average (SARIMA) pada Jumlah Penumpang Kereta Api di Sumatera Barat Serly Cania; Darvi Mailisa Putri; Ilham Dangu Rianjaya
JOSTECH Journal of Science and Technology Vol 3, No 2: September 2023
Publisher : UIN Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15548/jostech.v3i2.6880

Abstract

This study aims to obtain a model and determine the best model of the results of the number of train passengers in West Sumatra using Seasonal Autoregressive Integrate Moving Average (SARIMA). The research data comes from secondary data obtained from PT.KAI (Persero) Regional Division II West Sumatra to see the number of train passengers with a time span of January 2017 to April 2020. The results showed that the best model obtained was SARIMA. Selection of the best model based on the smallest AIC value of several models that have been obtained through ACF and PACF plots. Based on the best model, the forecasting results are close to the actual data, so the SARIMA model is suitable for forecasting.
Barisan Cauchy pada Ruang Semimetrik Terbatas Rianjaya, Ilham Dangu; Putri, Amelia; Musthofa, Syarto
JOSTECH Journal of Science and Technology Vol 4, No 1: Maret 2024
Publisher : UIN Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15548/jostech.v4i1.8234

Abstract

Semimetric spaces with bounded property means that it is bounded below and bounded above by constant multiples of a metric space. Moreover, in semimetric spaces, every convergent sequence is not necessarily to be a Cauchy sequence. This study aims to examine the property of sequences of semimetric spaces with boundary property. In this work, analytical method of proof is used. The results obtained are the equivalence of the convergence of the sequence, and the fulfillment of the Cauchy criterion in the finite semimetric space and the metric space that bounds it. In addition, the completeness property in one space also causes the other space to fulfill the completeness property.
Co-Authors Darvi Mailisa Putri Dwi Sulistiowati Eva Binsasi Hasibuan, Lilis Harianti Indah Permata Sari La Ode Nashar La Ode Sabran Mahendra, Fikri Rizky Maya Sari Syahrul Miftah Jannah Miftahul Jannah Miftahul Jannah Mohamad Syafi’i Musthofa, Syarto Norisca Lewaherilla Putri, Amelia Sabran, La Ode Sarbaini Sarbaini Sarbaini Sarbaini Serly Cania Sholih, Ahmad Shubhi Siti Helmyati