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All Journal Kubik KUBIK: Jurnal Publikasi Ilmiah Matematika Jurnal Pengabdian Masyarakat
Alrafiful Rahman
Universitas Darunnajah
Religion Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Economics, Econometrics & Finance Education Mathematics Physics

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Pelatihan Media Pembelajaran Berbasis Geogebra Bagi Guru Matematika dan Ipa Paiz Jalaludin; Krishna Prafidya Romantica; Alrafiful Rahman; Ani Nuraini
Jurnal Pengabdian Masyarakat (Bisma) Vol. 1 No. 2 (2023): Jurnal Pengabdian Masyarakat (Bisma)
Publisher : Universitas Darunnajah, Jakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61159/bisma.v1i2.147

Abstract

Technology-based learning media is one of the important things in learning Mathematics and Science in schools. It aims to create a fun, creative and innovative learning atmosphere so as to increase student motivation and learning outcomes. One of the learning media for Mathematics and Science that is often used is the GeoGebra application, which is the application of Mathematics in the study of geometry and algebra. However, previous data and research show that there is still a lack of mastery of Mathematics and Science teachers in using the software, especially in the location of service partners, namely in Darunnajah elementary, junior high, and high school schools, Jakarta. Therefore, the service proposed to carry out service in the form of training on the use of the GeoGebra application for teachers as a solution to these problems. The service activities ran smoothly, both in terms of preparation, implementation, and evaluation. This is shown by the results of a two-way evaluation between service and service partners. Participants are able to answer and practice directly the material presented in the evaluation session. In addition, based on the answers to the satisfaction / approval questionnaire, the participants' satisfaction with the activities carried out reached a fairly high average, reaching 87.80%.
Implementasi Metode Fuzzy Black-Scholes Real Options Valuation pada Rencana Investasi Smelter Nikel Paiz Jalaludin; Alrafiful Rahman; Indah Gumala Andirasdini
KUBIK Vol 8 No 2 (2023): KUBIK: Jurnal Publikasi Ilmiah Matematika
Publisher : Department of Mathematics, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/kubik.v8i2.29738

Abstract

Indonesia is the largest nickel producing country in the world in 2022 by contributing 48.48% of the world's total nickel production. Therefore, the Indonesian government pays attention to the development of smelter companies by planning to build around 53 companies in 2024, and 56.60 percent of them are nickel smelters. The potential of the nickel smelter needs attention from various circles, especially academics from various disciplines. One that needs attention is the study of the method of evaluating the economic value of the investment plan in the nickel smelter company. The DCF method, although practical and widely used, still has a drawback, which is that it does not pay attention to the flexibility of managers' decision-making in the middle of the ongoing investment period. As a solution, the real options valuation (ROV) method provides flexibility features in making these decisions. Among the real options methods that are often used is the Black-Scholes formula which is considered the most rigid but more practical real options method. However, this problem can be overcome by implementing the fuzzy number method into the ROV method, making it more flexible. The results of this study show that the fuzzy Black-Scholes ROV method is a practical method, can calculate the risks and projects flexibility, and become a solution when initial information is less available about the characteristics of nickel smelter investment projects.
Implementasi Metode Fuzzy Black-Scholes Real Options Valuation pada Rencana Investasi Smelter Nikel Paiz Jalaludin; Alrafiful Rahman; Indah Gumala Andirasdini
KUBIK Vol 8 No 2 (2023): KUBIK: Jurnal Publikasi Ilmiah Matematika
Publisher : Department of Mathematics, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/kubik.v8i2.29738

Abstract

Indonesia is the largest nickel producing country in the world in 2022 by contributing 48.48% of the world's total nickel production. Therefore, the Indonesian government pays attention to the development of smelter companies by planning to build around 53 companies in 2024, and 56.60 percent of them are nickel smelters. The potential of the nickel smelter needs attention from various circles, especially academics from various disciplines. One that needs attention is the study of the method of evaluating the economic value of the investment plan in the nickel smelter company. The DCF method, although practical and widely used, still has a drawback, which is that it does not pay attention to the flexibility of managers' decision-making in the middle of the ongoing investment period. As a solution, the real options valuation (ROV) method provides flexibility features in making these decisions. Among the real options methods that are often used is the Black-Scholes formula which is considered the most rigid but more practical real options method. However, this problem can be overcome by implementing the fuzzy number method into the ROV method, making it more flexible. The results of this study show that the fuzzy Black-Scholes ROV method is a practical method, can calculate the risks and projects flexibility, and become a solution when initial information is less available about the characteristics of nickel smelter investment projects.
Co-Authors Ani Nuraini Indah Gumala Andirasdini Krishna Prafidya Romantica Paiz Jalaludin