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All Journal Sinkron : Jurnal dan Penelitian Teknik Informatika Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat FARABI: Jurnal Matematika dan Pendidikan Matematika Journal of Mathematics Technology and Education
Syahriol Sitorus
Universitas Sumatera Utara
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Physics Social Sciences Transportation

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Gold Price Forecasting Using Autoregressive Integrated Moving Average (ARIMA) Method Ruth Elizabeth; Syahriol Sitorus
Journal of Mathematics Technology and Education Vol. 1 No. 1 (2021): Journal of Mathematics Technology and Education
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (581.153 KB) | DOI: 10.32734/jomte.v1i1.6859

Abstract

Gold is one type of investment that is starting to be favored by many people. Every investment has risk, including gold investment. This risk of loss needs to be minimized to obtain maximum profit. So it takes proper planning and forecasting to invest in gold. This study aims to determine the best forecasting model for the price of 1 gram gold bullion produced by PT Aneka Tambang (ANTAM), using the ARIMA method. The data used in this study comes from historical data in 2016 to 2019 to predict gold prices in 2020-2021. Gold Price Forecasting using the ARIMA method produces ARIMA(1,1,0) with the model model . . With error values ​​MAE= 94491.42, MAPE= 10.47776409, MSE= 12281027973, RMSE=110819.7996.
Optimization Model of Location Routing Problem for Disaster Relief Distribution Fitri Rezky Hamzani; Syahriol Sitorus; Syahril Efendi
Sinkron : jurnal dan penelitian teknik informatika Vol. 7 No. 3 (2022): Article Research Volume 7 Number 3, July 2022
Publisher : Politeknik Ganesha Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33395/sinkron.v7i3.11604

Abstract

Disaster relief distribution is a very important component in the overall disaster response process. Consideration of limited funds, time pressure and surge of demand that come together increase to the complexity of the distribution process that must be done in a short time. Meanwhile, delays in the delivery of relief can lead to a decrease in the level of safety and welfare of disaster-affected victims. This paper proposes a location routing problem optimization model for disaster relief distribution with a multi-objective approach that minimizes waiting time and total costs. This model can help decision makers to determine the number and location of distribution centers which are opened and optimal vehicle routes.
Model Goal Programming Untuk Mengoptimasi Penjadwalan Perawat Rumah Sakit Universitas Sumatera Utara Eiby Valentine; Syahriol Sitorus
FARABI: Jurnal Matematika dan Pendidikan Matematika Vol 6 No 1 (2023): FARABI
Publisher : Program Studi Pendidikan Matematika FKIP UNIVA Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47662/farabi.v6i1.436

Abstract

Rumah Sakit Universitas Sumatera Utara memiliki bagian pelayanan keperawatan yang mengemban tanggung jawab untuk meningkatkan kinerja pelayanan rumah sakit dan sering dianggap sebagai salah satu sektor terpenting dari keseluruhan pelayanan kesehatan pada rumah sakit tersebut. Baik buruknya pelayanan keperawatan dapat dikatakan sangat berkaitan dengan baik buruknya sistem penjadwalan kerja. Sebagaimana terlihat pada sistem penjadwalan di Rumah Sakit Universitas Sumatera Utara dimana pada awalnya hanya mengandalkan kemampuan kepala perawat untuk membuat penjadwalan secara manual sehingga terdapat beberapa kekurangan yaitu ketidakseimbangan jadwal dan timbulnya kecemburuan di antara perawat yang mempengaruhi kinerja pelayanan. Tujuan dari penelitian ini adalah untuk mendapatkan solusi dalam mengatasi masalah penjadwalan manual dengan menerapkan model nonpreemptive goal programming yang dapat menyusun jadwal perawat berdasarkan pertimbangan aturan rumah sakit (kendala utama) dan preferensi perawat (kendala tambahan). Metode yang digunakan dalam penelitian ini adalah goal programming dimana aturan-aturan penjadwalan dimodelkan dalam bentuk persamaan dan pertidaksamaan matematika untuk diselesaikan dengan model nonpreemptive goal programming melalui proses komputasi menggunakan software LINGO 18.0. Hasil dari penelitian ini adalah terciptanya jadwal yang optimal untuk periode waktu 31 hari kerja sesuai dengan aturan rumah sakit dan preferensi perawat dengan meminimalkan variabel deviasi pada ketiga kendala tujuan.
Online Learning For Primary Level / Madrasah With Online Applications In Min 2 Serdang Bedagai Suyanto; Nurul Maulida Surbakti; Syahriol Sitorus; Rosman Siregar; Zahedi
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 6 No. 1 (2021): ABDIMAS TALENTA : Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (274.298 KB) | DOI: 10.32734/abdimastalenta.v6i1.5117

Abstract

The online learning system is still having problems. As a result of the observations of the USU team, several obstacles were felt not only by the teachers at MIN 2 Serdang Bedagai but also by students and parents. The problems that occur are quite diverse. Starting from limited signal, limited devices suitable for online learning, to the lack of technological knowledge of teachers and students on online applications that support the teaching and learning process. There are various online applications available today, such as Google Classroom, Zoom, Google Meet, Youtube, and others. These various online applications play an important role in helping students and teachers in the distance learning process. The USU team conducted training using the online application Google Classroom and Zoom. Google Classroom and Zoom were chosen because they are easier for the teacher to implement, besides that the two online applications facilitate coordination and communication between teachers and students, so that the material being taught can be discussed more easily, more freely and can be updated more quickly. In this community service, Online Learning training was conducted for the Elementary School / Madrasah Ibtidaiyah Level with Various Online Applications at MIN 2 Serdang Bedagai. This community service has reached the implementation stage of training which begins with the initial survey stage, provision of training modules and also training. The next stage is monitoring and evaluation and feedback. 
Co-Authors Eiby Valentine Fitri Rezky Hamzani Nurul Maulida Surbakti Rosman Siregar Ruth Elizabeth Suyanto Syahril Efendi Zahedi