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All Journal POSITIF Prosiding SI MaNIs (Seminar Nasional Integrasi Matematika dan Nilai-Nilai Islami) Ilmu Pendidikan: Jurnal Kajian Teori dan Praktik Kependidikan Jurnal Pilar Nusa Mandiri Desimal: Jurnal Matematika MUST: Journal of Mathematics Education, Science and Technology Adi Widya : Jurnal Pengabdian Masyarakat Buana Matematika : Jurnal Ilmiah Matematika dan Pendidikan Matematika Jurnal Ilmiah Sinus Jurnal Karinov Jurnal PAUD: Kajian Teori dan Praktik Pendidikan Anak Usia Dini Square : Journal of Mathematics and Mathematics Education Jurnal Informa: Jurnal Penelitian dan Pengabdian Masyarakat Jurnal TIKOMSIN (Teknologi Informasi dan Komunikasi Sinar Nusantara) Journal of Mathematics Education and Science Indonesian Journal of Mathematics and Natural Science Education International Journal of English Linguistics, Literature, and Education (IJELLE) Postulat : Jurnal Inovasi Pendidikan Matematika Journal of Practical Computer Science (JPCS) prosiding seminar nasional Abdi Makarti Euclid International Journal of Trends in Mathematics Education Research (IJTMER) Journal of Technology, Mathematics and Social Science Jurnal Pengabdian Masyarakat Ilmu Komputer Indonesian Journal of Mathematics and Natural Science Education Jurnal Pengabdian Masyarakat Teknologi dan Pendidikan (MANTAP) Journal of Information Technology, Computer Engineering and Artificial Intelligence (ITCEA) International Journal of Computing Science and Applied Mathematics-IJCSAM
Retno Tri Vulandari
STMIK Sinar Nusantara
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Physics Social Sciences Other

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The Application of Non-linear Cubic Regression in Rice Yield Predictions Vulandari, Retno Tri; Wijayanto, Hendro; Lathofy, Afan
Desimal: Jurnal Matematika Vol. 3 No. 3 (2020): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v3i3.6580

Abstract

The rice yields have fluctuated in Wonogiri Regency. This occasion happened in 2016-2018. Therefore, a prediction is needed to know whether rice yields will increase or decrease in the following year. The purpose of this study was to apply the polynomial non-linear regression method of third-degree in predicting rice yields. This study utilized the Unified Modeling Language (UML) as the system design, black-box testing as the functional testing, and MSE testing as the validity testing. The computed data was data of 2016-2018. The results showed that the prediction of 2017-2019 using the harvested area model produced more accurate calculations. The harvested area model produced the same MSE value in manual and application calculations, which were 405433,1349 in 2017, 312677,7798 in 2018, and 171183.6347 in 2019. The polynomial non-linear cubic regression is a solution to predict rice yields. The output of the application is the prediction information for rice yields
The The Impact of Using Tutorial Videos Uploaded on Youtube Platform toward the Students’ Learning Motivation and Their English Learning Outcomes Pravitasari, Suryanti Galuh; Vulandari, Retno Tri
International Journal of English Linguistics, Literature, and Education (IJELLE) Vol. 5 No. 02 (2023)
Publisher : Universitas Veteran Bangun Nusantara

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Abstract

This research was aimed at finding out whether the use of tutorial videos uploaded on the YouTube platform can increase the learning outcomes and the learning motivation of the students. This research was categorized into quantitative experimental design types by providing a pretest before giving the students treatment using tutorial videos uploaded on YouTube during the teaching and learning process and a post-test after the treatment. The object of the research was the third-semester students of STMIK Sinar Nusantara Surakarta who were taking English III which was designed for the TOEFL Preparation Test. The 60 respondents were selected by using a simple random sampling technique. The data collection was taken from the results of the pre-post tests and the result of the questionnaire concerning the students’ learning motivation using the tutorial media on YouTube and their opinions about the videos. The average score of the pre-test was 61 while the average score of the post-test was 82. Therefore it can be concluded that the use of the tutorial video uploaded on Youtube is considered effective in helping the students to increase their learning outcomes. Meanwhile, the use of tutorial videos uploaded on Youtube has a regression coefficient value of 0.306 which means that it has a positive influence on Learning Motivation. Therefore, it can be concluded that learning English for TOEFL's Grammar test preparation by watching tutorial videos on Youtube is effective to increase the student’s English learning motivation hence increasing their learning outcomes.
IMPLEMENTASI METODE DOUBLE EXPONENTIAL SMOOTHING PADA PREDIKSI JUMLAH PRODUK UMKM Dorestin, Nacita Agnes; Vulandari, Retno Tri; Saptomo, Wawan Laksito Yuly; Widada, Bebas; Wijayanto, Hendro
Journal of Technology, Mathematics and Social Science Vol. 3 No. 2 (2023): Desember 2023
Publisher : IKIP PGRI Bojonegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30734/j'thoms.v3i2.3711

Abstract

Y2K Batik is an SME (Small and Medium Enterprise) engaged in batik. Y2K Batik produces and sells beach wear with various motifs. One of the important things in business is inventory of merchandise, inventory of merchandise is a factor in determining the success of a trading company to achieve its goals, because the goods sold affect the level of income to increase company profits. With these considerations, it is necessary to analyze the production of beach wear for the availability of merchandise in fulfilling customer orders. Based on the above background, the scope of the problem in this study is master data collection obtained from records of selling beach batik cloth periodically from time to time. By utilizing the existing data and applying certain methods, a sales forecasting prediction can be made using the Double exponential Smoothing method. From the results of calculations and testing of forecasting data on the Mandala Motif Beach Fabric variable with the most optimal value using = 0.9 of 2127 with an error value of 19.46% and an accuracy rate of 80.54% (Good). The Canting Motif Beach Wear variable with the most optimal value using = 0.9 of 3174 with an error value of 3.61% and an accuracy rate of 96.39% (Very Good). Double Exponential Smoothing is the most widely used method to determine the trend equation of the second smoothing data through a smoothing process. The programming language uses Microsoft Visual Studio 2013 and the DBMS uses Microsoft SQL Server 2012. The purpose of this research is to create a system that can simplify the process of analyzing the production of beach wear in order to meet the availability of goods ordered by customers
Black-Scholes Model of European Call Option Pricing in Constant Market Condition Retno Tri Vulandari; Sutrima Sutrima
(IJCSAM) International Journal of Computing Science and Applied Mathematics Vol. 6 No. 2 (2020)
Publisher : LPPM Institut Teknologi Sepuluh Nopember

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Abstract

Investment is a saving activity with the aim of overcoming price increases or often called inflation. Investments can be in the form of gold, property, silver or stock investments. Stock investment is considered more profitable than just saving at a bank. Currency values are declining due to inflation. This results in a tendency to invest in shares. Stock investment carries a great risk. Therefore, in 2004 stock options began to trade. Stock options are contracts that give the holder the right to buy / sell shares at the agreed time, at a certain price. Stock option prices tend to be cheaper than stock prices. Therefore, determining the right price of stock options is needed. In this study, we will focus on the European type of buying options, the right to buy shares at an agreed price at maturity. The purpose of this study is the completion of the Black-Scholes model of European type option prices at a constant market, assuming stock movements meet the stochastic differential equation, fixed risk-free interest rates, companies distributing dividends, no taxes, no transaction costs, and free market arbitration. The results of this research are in the form of differential equations and the settlement of the Black-Scholes model of European type call option prices, and a case study used by stock option contracts with a maturity of January 4, 2010, PT Aqua Golden Mississippi Tbk.
MODEL PERAMALAN PENJUALAN MENGGUNAKAN PENDEKATAN WEIGHTED MOVING AVERAGE PADA UMKM KOPI Lylla, Cantika Putri; Vulandari, Retno Tri; Kusumaningrum, Andriani
Jurnal Teknologi Informasi dan Komunikasi (TIKomSiN) Vol 14, No 1 (2026): Jurnal Tikomsin, Vol 14, No.1, April 2026
Publisher : STMIK Sinar Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30646/tikomsin.v14i1.1077

Abstract

Sales forecasting plays a critical role in supporting effective inventory management, particularly for small and medium enterprises (SMEs) in the coffee sector, where demand exhibits fluctuating patterns over time. Inaccurate demand estimation may lead to stock shortages, resulting in lost sales opportunities, or overstocking, which increases holding costs and product waste. Therefore, a reliable and accurate forecasting model is required to support optimal inventory planning and operational efficiency. This study aims to develop and implement a sales forecasting model using the Weighted Moving Average (WMA) method and to evaluate its predictive accuracy. The WMA method, as a time series approach, assigns different weights to historical data, emphasizing more recent observations to better capture short-term trends. Historical coffee sales data were utilized as the basis for model development. Forecast accuracy was evaluated using the Mean Absolute Percentage Error (MAPE). The results indicate that the WMA model provides a high level of accuracy, with a forecast value of approximately 22,914 units for the subsequent period and a MAPE value of 0.29% using weight parameters of 0.7, 0.2, and 0.1. This level of accuracy is categorized as very high, demonstrating that the proposed model is effective and reliable for supporting inventory decision-making and improving operational performance in SMEs.
Detection of H1N1 Sequence Alignment with Basic Local Alignment Search Retno Tri Vulandari; Sri Harjanto
Journal of Information Technology, Computer Engineering and Artificial Intelligence (ITCEA) Vol. 1 No. 2 (2024): Journal of Information Technology, Computer Engineering and Artificial Intellig
Publisher : Redtech Putra Benua

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Abstract

Bioinformatics is a science that studies the management and analysis of biological information. Bioinformatics includes application of mathematics, statistics, and informatics to biological problems to solve. Bioinformatics can store data generated by the genome project with regular and high degree of accuracy. Basic local alignment search is one of the methods used to process penyejajaran molecular data sequences. In 2009, there is a virus that attacks the respiratory tract that is the swine flu. The virus is spread around the world, so that retrieved the journal research on diverse virus DNA sequences in different endemic countries. Therefore, in this study will be explained about the process sequence alignment of the H1N1 swine flu virus. H1N1 Weiss AF 250365.2 and H1N1 Swine AF250364.2 have 90% similarity level.
Pengembangan Profil Perusahaan Rumah Tahsin Ash Habul Qur’an Kartasura Berbasis Web Suryanti Galuh Pravitasari; Retno Tri Vulandari; Muhammad Isnan Nurrohman; Faris Abyan Zakly
Jurnal Pengabdian Masyarakat Teknologi dan Pendidikan (MANTAP) Vol. 1 No. 1 (2024): Jurnal Pengabdian Masyarakat Teknologi dan Pendidikan (Jurnal Mantap)
Publisher : Redtech Putra Benua

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Abstract

The creation of a Web profile for Rumah Tahsin Ash Habul Qur'an, Sukoharjo is to introduce Rumah Tahsin Ash Habul Qur'an, Sukoharjo which aims to provide information to the public so that the public is more aware of the existence and development of Rumah Tahsin Ash Habul Qur'an, Sukoharjo. In addition, this web profile aims to facilitate public access to information about Rumah Tahsin Ash Habul Qur'an, Sukoharjo, as well as a publication media for the village government to convey various work programs, reports, and information to the community. The data collection methods carried out by the author include interviews, observations and literature studies. The interview was conducted with the village secretary. Observations are carried out to match data and anticipate new information at the research location, so that actual and reliable data and information are obtained. Meanwhile, literature studies are useful for obtaining a theoretical foundation in the form of experts regarding the subject of research. The steps to create this web project are pre-production, production, post-production
Pengembangan Profil DPRD Kota Surakarta melalui Video Profile Ervina Yuliana Ningrum; Sapto Nugroho; Retno Tri Vulandari
Jurnal Pengabdian Masyarakat Teknologi dan Pendidikan (MANTAP) Vol. 1 No. 1 (2024): Jurnal Pengabdian Masyarakat Teknologi dan Pendidikan (Jurnal Mantap)
Publisher : Redtech Putra Benua

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Abstract

Profile Video as a promotional media and so that it can be better known to the wider community. The data collection method carried out by the author is through field studies, interviews and libraries. This field study was carried out by direct observation at the research location and taking documentation in the form of videos for the needs of making a profile video of the Surakarta DPRD. Then direct interviews are used to improve information in making a profile video of the Surakarta DPRD, while library studies are useful for obtaining related theories based on theories in the form of experts regarding the objects being researched such as applicable laws and regulations and related to the matters being researched. The result obtained is a profile video of the Surakarta DPRD which can support promotional activities and can be better known to the wider community
Pengembangan Sarana Informasi dengan Video Profil di TK RA Hidayatullah Surakarta Retno Tri Vulandari; Hendro Wijayanto; R Arie Febrianto; Dwi Remawati; Zannuba Anugrah Indah Lestari; Ina Putri Pertiwi; Widya Restu Utami; Nirma Mujirahayu Meyliana
Jurnal Pengabdian Masyarakat Teknologi dan Pendidikan (MANTAP) Vol. 1 No. 2 (2024): Jurnal Pengabdian Masyarakat Teknologi dan Pendidikan (Jurnal Mantap)
Publisher : Redtech Putra Benua

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Abstract

The development of information in Kindergarten RA Hidayatullah to be known to the public, it is necessary to make a profile video in the form of audio visual as a means of promotion so that the community will be able to easily receive information from Kindergarten RA Hidayatullah. It is hoped that after the profile video is made, it can give a positive story and as a means of promoting RA Hidayatullah Kindergarten which is easily accepted by the wider community. The data collection methods carried out include observation, interviews, and literature studies. By means of direct observation or survey at RA Hidayatullah Kindergarten, complete and accurate data will be obtained. In addition, the observation method has the advantage of being able to know clearly about the environmental conditions of RA Hidayatullah Kindergarten. This interview method is a data collection method carried out by providing questions in accordance with the video that will be done to the teacher who is responsible for delivering information about RA Hidayatullah Kindergarten. The purpose of the interview is to obtain the right information from trusted sources, then collect data by asking questions related to the theme of the thematic practice work being carried out. Literature study, collection and information as well as knowledge obtained from books about the theory concerned. The creation of this profile video is expected to make it easier to promote RA Hidayatullah Kindergarten and can be known by the wider community.
Digital Leap Workshop: Build Your Online Store Boost Your Sales Sri Harjanto; Retno Tri Vulandari; Suryanti Galuh Pravitasari
Jurnal Pengabdian Masyarakat Teknologi dan Pendidikan (MANTAP) Vol. 3 No. 2 (2026): Jurnal Pengabdian Masyarakat Teknologi dan Pendidikan (Jurnal Mantap)
Publisher : Redtech Putra Benua

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Abstract

During the "Digital Leap Workshop: Build Your Online Store, Boost Your Sales" community service activity held at Rumah Quran Qolbun Salim, a key focus was the use of TikTok Shop and the Affiliate Program as digital sales and marketing tools for elderly participants and retirees. The activity demonstrated that participants gained a fundamental understanding of TikTok Shop as a platform integrating e-commerce with video content, as well as the TikTok Affiliate program as an opportunity to generate income without needing to own their own products. Participants were introduced to the initial steps of account creation, product selection, simple content creation, and the mechanics of sales commissions. They showed growing interest and enthusiasm for these relatively easy and flexible sales and promotional models. The material was presented using a practical, step-by-step approach, allowing participants to follow along at their own pace. This activity offered a realistic and suitable digital business alternative for the elderly and retirees, while opening up opportunities for additional income through the wise and sustainable use of TikTok Shop and affiliate programs.
Co-Authors Afan Lathofy Ahmad Samawi Al Fiyan Nizaela F Andriani Kusumaningrum Bayu Tristanto Bebas Widada Bentar Putra Pamungkas Danar Wijaya Aditama Dhian Dwi Hermawan Dhian Dwi Hermawan Didik Nugroho Dorestin, Nacita Agnes Dwi Handoko Dwi Handoko Dwi Rema wati Dwi Remawati Dwi Tri Laksono Eny Nur Aisyah Erinsyah Aditya Nugroho Putro Ervina Yuliana Ningrum Fadel Thoriq Nur Muhammad Faris Abyan Zakly Febriyanti, Renita Hakam Febtadianrano Putro Hendro Wijayanto Hendro Wijayanto Heri Setyawan Hermawan, Dhian Dwi I Made Seken Ina Putri Pertiwi Kumaratih Sandradewi Kustanto Kustanto Kusumaningrum, Andriani Kusumawijaya, Andriani Kusumaningrum Lathofy, Afan Lylla, Cantika Putri Mita Purwati Muhammad Hasbi MUHAMMAD HASBI Muhammad Isnan Nurrohman Muhammad Yusuf Nacita Agnes Dorestin Nacita Agnes Dorestin Nirma Mujirahayu Meyliana Nugraheni, Ria Pertiwi Nugroho, Zulkifly Setyo Nur Fitrina Parwitasari, Tika Andarasni paulus harsadi Pravitasari, Suryanti Galuh R Arie Febrianto Ragil Prasojo Raharja, Bayu Dwi Ria Pertiwi Nugraheni Rimawati, Elistya Sakti, Dicky Cahyono Sapto Nugroho Saptomo, Wawan Laksito Yuly Setiyowati Setiyowati Setiyowati Setiyowati Setiyowati Setiyowati Setiyowati Sri Hariyati Fitriasih Sri Harjanto Sri Harjanto Sri Harjanto Sri Siswanti Sumanto Suryadi Suryadi Suryanti Galuh Pravitasari Suryanti Galuh Pravitasari Sutrima Sutrima Teguh Susyanto Teguh Susyanto Tika Andarasni Parwitasari Tri Irawati, Tri Tristanto, Bayu Usep Kustiawan W, Yustina Retno Waskitho, Anggit Widhi wati, Dwi Rema Wawan Laksito YS Wawan Laksito Yuly Saptomo Widada, Bebas Widya Restu Utami Wijayanto, Hendro Wuri Astuti Yehoshua Yehoshua Yustina Retno Wahyu Utami Zannuba Anugrah Indah Lestari