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Program Studi Matematika Fakultas Sains dan Teknologi UIN Imam Bonjol Padang Kampus III Jl. Sungai Bangek Kelurahan Balai Gadang Kecamatan Koto Tangah Kota Padang
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INDONESIA
Journal of Science and Technology
ISSN : 27982696     EISSN : 27980057     DOI : 10.15548
Core Subject : Science, Education,
JOSTECH focuses on the dissemination of scientific research in the field of Sains and Technology. We invite researchers, academics, practitioners to join us, submitting your original manuscripts. The JOSTECH encourages submission of the manuscript dealing with all sciences and technology aspects, but not limited to Mathematics and Information Technology
Articles 30 Documents
Perancangan Game Edukasi Berhitung Berbasis Mobile Aplikasi Inventor Rosdiani, Amelia; Warmansyah, Jhoni
JOSTECH: Journal of Science and Technology Vol 1, No 2: September 2021
Publisher : UIN Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (555.618 KB) | DOI: 10.15548/jostech.v1i2.3103

Abstract

Technological advances that are developing very rapidly have a positive impact on the development of various educational games that can be designed as a tool to stimulate aspects of early childhood development. This study aims to design a numeracy educational game based on the inventor's mobile application that can be used in early childhood education units. The method used is Educational Design Research (EDR) which is limited to a design model with stages; 1) Preliminary research; 2) Prototyping stage; 3) Phase assessment. This study resulted in the design of a numeracy educational game that can be used by PAUD units to improve numeracy skills, which is one of the aspects of cognitive development. Teachers can also design using the Inventor mobile application to improve other aspects of child development.
Pemodelan Laju Perubahan Nilai Tukar Rupiah (IDR) terhadap Dolar Amerika (USD) dengan Metode Markov Switching Autoregressive (MSAR) Yurinanda, Sherli; Putri, Darvi Mailisa
JOSTECH: Journal of Science and Technology Vol 1, No 1: Maret 2021
Publisher : UIN Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (340.907 KB) | DOI: 10.15548/jostech.v1i1.2438

Abstract

This study aims to determine the modeling of the exchange rate change rate of the Rupiah (IDR) against the US dollar (USD) using the Markov Switching Autoregressive (MSAR) method. The research data is sourced from secondary data through website investing to see the Rupiah exchange rate against the US dollar with a time span from January to December 2020. The results show that the best model obtained is MS(2)AR(3) with parameters = 0.031119 and = -0.000504, where when state = 1, the average rate of change in the rupiah exchange rate against the US dollar is 0.031119 per day, while when state = 2 the average rate of change in the rupiah exchange rate against the US dollar is -0.000504 per day. 
Keekivalenan Presentasi Grup 〈x,y|y^(-1) xyx,x^(-1) yxy〉 dan 〈x,y|〖x^4,x〗^2 y^(-2),x^(-1) yxy〉 menggunakan Transformasi Tietze Mardianto, Dedi
JOSTECH: Journal of Science and Technology Vol 1, No 1: Maret 2021
Publisher : UIN Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (194.033 KB) | DOI: 10.15548/jostech.v1i1.2369

Abstract

Pada penelitian ini membahas tentang transformasi untuk dua presentasi grup berbeda yang mendefinisikan grup yang sama. Diberikan dua presentasi grup  dan . Ditunjukkan bahwa  dan adalah ekivalen atau isomorpis. Untuk menunjukan ini di gunakan transformasi tietze.
Sistem Informasi Pemesanan Semen Curah Pada PT.Sumber Niaga Interindo Berbasis Webgis Suryani, Ade Irma; Rahmelina, Liranti; Maulidi, Syahri
JOSTECH: Journal of Science and Technology Vol 1, No 2: September 2021
Publisher : UIN Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (683.948 KB) | DOI: 10.15548/jostech.v1i2.2804

Abstract

The purpose of building an information system for Bulk Cement Ordering at PT Sumber Niaga Interindo is to facilitate bulk cement ordering, provide reports that can be stored in the information system with a database and the driver will be assisted in locating locations with the Map feature. The problem that the authors found was that ordering bulk cement was still done manually, such as by telephone, sms and via other social media, reports that were not compiled, and the difficulty of the driver in finding a new ordering location or had never been visited by the driver. For data collection methods carried out is by conducting interviews and literature studies, and the software development method used is the SDLC (System Development Life Cycle) method, namely warterfall, while the tools used in designing this application are unified modeling language and this application was built using web-based PHP programming language. The final result of this research is the creation of Bulk Cement Ordering Information System at PT. Sumber Niaga Interindo based on Webgis which can speed up or simplify the process of ordering bulk cement, reports that are automatically generated by the system after placing the order and overcoming the difficulty of the driver in finding the location of the order. 
Sistem Pengolahan Data Pegawai dan Data Ormas/LSM Pada Badan Kesatuan Bangsa Dan Politik Kota Dumai Berbasis Web Faradilla, Claura; Wahyuni, Deasy; Sofiyan, Amat
JOSTECH: Journal of Science and Technology Vol 1, No 2: September 2021
Publisher : UIN Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1130.78 KB) | DOI: 10.15548/jostech.v1i2.3101

Abstract

Badan Kesatuan Bangsa dan Politik (KESBANGPOL) of Dumai City is one of the Regional Apparatus Organizations (OPD) in Dumai City. Previously, the processing of data at the KESBANGPOL agency has used several office application but there are still obstacles that occur in the processing process employee data and community Organization (ORMAS)/LSM which are usually in the from of written data and then processed using several office applications and then an information is generated about employees and ORMAS/LSM, one of the obstacles comes from the relatively long time spent and tend to be prone to errors (data redudancy). To solves this problem, a lecturer and employee data information system was created using methode of waterfall and using the PHP Programming language which can make it easier for employees and ORMAS/LSM registrant toprocess and access information regarding employe data and ORMAS/LSM data at the KESBANGPOL of Dumai City. This research result the processing of data at the Kesbangpol Dumai City that will simplify and accelerate data management wrongdoing, local regulations so that services is getting better.
Kestasioneran Kurs Dolar Amerika dan Harga Saham Pada Masa Pandemi Covid 19 Tahun 2020 Rahimullaily, Rahimullaily; Amalina, Amalina
JOSTECH: Journal of Science and Technology Vol 1, No 1: Maret 2021
Publisher : UIN Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (351.038 KB) | DOI: 10.15548/jostech.v1i1.2439

Abstract

This study aims to determine the stationarity of the US dollar exchange rate and stock prices during the Covid 19 pandemic. One of the interesting stocks to study is the stock price of PT Telecommunications Indonesia Tbk. The augmented Dickey-Fuller test was used to determine the stationarity of the two variables. The research data is sourced from secondary data through the official website of Bank Indonesia to view the US Dollar Exchange Rate and through the website investing to see the stock price of PT. Telekomunikasi Indonesia Tbk during the Covid 19 pandemic period in Indonesia occurred from March to December 2020. The results showed that the check of the stationary stock price of PT. Telekomunikasi Indonesia Tbk and the US Dollar exchange rate at level I (0) was not stationary. While the two variables are stationary in the first differencing conditions I (1).
Sistem Informasi Pendataan Pelanggaran Peraturan Daerah Pada Satuan Polisi Pamong Praja Kota Padang Putri, Nency Extise; Elizamiharti, Elizamiharti; Arman, Arman
JOSTECH: Journal of Science and Technology Vol 1, No 1: Maret 2021
Publisher : UIN Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (639.119 KB) | DOI: 10.15548/jostech.v1i1.2441

Abstract

The Civil Service Police Unit (Satpol PP) of Padang City is a supporting element of the Padang City Government's task in securing and implementing City Government policies that are specific in the field of peace and public order. So many data on violations are handled and the manual data collection of violations results in not yet optimal management of data on violations of Regional Regulations (Perda), so we need an information system for collecting data on violations of regulations. The method of development in the preparation of this study in library research, field research, laboratory research and System Development Life Cycle (SDLC). The author's program implementation uses PHP programming language with MySQL Server database. With the implementation of the information system on collecting data on local violations in Padang City Satpol PP, it is hoped that it will simplify and speed up the management of regulations on local regulations, so that service to the community is better. 
Pemodelan Pencegahan Penularan Scabies Utami, Nita
JOSTECH: Journal of Science and Technology Vol 1, No 2: September 2021
Publisher : UIN Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (365.508 KB) | DOI: 10.15548/jostech.v1i2.3045

Abstract

Health is the most important thing for every individual, because if illness has approached the individual, whatever the disease is, it becomes a fear that cannot be defeated by anything except by the power of God. The skin is a part of the human body that is quite sensitive to various diseases. Skin disease can be caused by many factors. Scabies is a skin disease caused by Sarcoptes scabei variant hominis (a type of tick, mite), characterized by complaints of itching, especially at night and transmitted through direct or indirect contact through former bedding or bedding. clothes. To overcome the transmission of scabies, the purpose of this study is how to mathematically model the prevention of scabies transmission?. The method used is Stability Theory.
Prototype Kran Wudhu Otomatis Berbasis Arduino Uno Ramadhaningrum, Ramadhaningrum; Hidayatullah, Rahmat; F.Afidh, Reza Fahlevie
JOSTECH: Journal of Science and Technology Vol 1, No 2: September 2021
Publisher : UIN Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1959.797 KB) | DOI: 10.15548/jostech.v1i2.3099

Abstract

The conventional ablution system has a weakness where the use of water is wasteful because humans forget to turn off the faucet or faucets that are easily damaged due to frequent use by humans. The purpose of the research is to make ablution easier, save water use and automate water faucets and tub filling. By utilizing an automatic ablution device with a distance sensor (ultrasonic sensor) as a human detector in taking ablution water and the control system is the Arduino Uno. The method used in this study is the waterfall method where in this method there are steps to work on the research, namely, needs analysis, tool design, tool making and coding, tool testing and tool implementation. In this study, it can be concluded that if the distance is 30 cm then the solenoid valve is active and water comes out, if the distance is > 30 cm then the solenoid valve is not active and the water does not flow and if the sensor distance to the water surface is 18 cm then the water pump will turn on. the sensor distance to the water surface is < 5 cm, the water pump will turn off
Ekspektasi Maksimum Percentage Drawdown pada data Saham PT. Mayora Tbk dengan simulasi Monte Carlo Lilis Harianti Hasibuan; Rani Kurnia Putri
JOSTECH: Journal of Science and Technology Vol 1, No 1: Maret 2021
Publisher : UIN Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (498.244 KB) | DOI: 10.15548/jostech.v1i1.2440

Abstract

A drawdown is a tool for defining trading strategies for commodities, stocks, and investments. This analysis is one way of monitoring the decline in asset value over a certain period of time. This journal will discuss PT.MayoraTbk stock trading strategy. By analyzing the observed drawdown in the specified time period. The drawdown analysis here uses the feedback control on PT.MayoraTbk stock trading is assumed to follow the geometric Brownian motion. The data obtained is tested whether the data meets Brown's motion assumptions. Then the maximum drawdown expectation is determined at the selected time interval. An estimate is carried out for the maximum expected drawdown percentage of the share value. To test the validity of the estimation results, a Monte Carlo simulation is carried out. Monte Carlo simulation with the term Sampling Simulation or Monte Carlo Sampling Technique. This simulation sampling illustrates the possible use of sample data using the Monte Carlo method and also the distribution can be known or estimated. This simulation uses existing data (historical data) that is actually used in a simulation that includes inventory or sampling with a known and determined probability distribution, so this Monte Carlo simulation can be used. The basic idea of this Monte Carlo simulation is to generate or generate a value to form a model of the variables and study it.

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