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All Journal E-Jurnal Matematika CAUCHY: Jurnal Matematika Murni dan Aplikasi Communication in Biomathematical Sciences Jambura Journal of Mathematics FIBONACCI: Jurnal Pendidikan Matematika dan Matematika Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Jambura Journal of Biomathematics (JJBM) Jurnal Matematika Integratif Mathematical Sciences and Applications Journal Diophantine Journal of Mathematics and Its Applications
Anita Triska
Departemen Matematika Fakultas MIPA, Universitas Padjadjaran
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Social Sciences Transportation

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Journal : Diophantine Journal of Mathematics and Its Applications

 1 
Kajian Matematis Mengenai Strategi Pengembangbiakan Sapi Potong Lokal Guna Meningkatkan Kualitas Daging Sapi Hidayat, Zaki Maulana; Andzar Tsaqif Laksana; Anita Triska
Diophantine Journal of Mathematics and Its Applications Vol. 2 No. 1 (2023)
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/diophantine.v2i01.27771

Abstract

Beef is one of the most demanded food products in Indonesia compared to other meat commodities. The high demand of this commodity causes a shortage of its supply so that the government has to import it from other countries. As the consequences, people in Indonesia prefer to consume imported beef rather than local beef, especially those in the food industry, since imported beef has better quality. Thus, government may establish a program that is able to increase the local beef quality thereby increasing its competitiveness, for instant by cross-breeding of local and imported cattle. This paper is to discuss a cross-breeding simulation to predict the distribution of offspring produced in the next few generations through mathematical approach. Simulations are conducted by following the X-Linked Inheritance concept and algebra. Simulations are carried out by three different scenarios which consider gender of the imported cattle. The simulations show that all scenarios are able to produce local cattle offspring with imported quality. However, the offspring from the cross-breeding still preserve cattle with original local genetic with a different ratio between the first and the second scenario.
Analisis Manajemen Pengelolaan Pohon Gmelina arborea Roxb. pada Hutan Rakyat di Tasikmalaya dan Banjar, Jawa Barat Ellena, Siti Aizal Yasni; Lidia H. Y. A. Rudamaga; Anita Triska
Diophantine Journal of Mathematics and Its Applications Vol. 2 No. 1 (2023)
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/diophantine.v2i01.27772

Abstract

Forests are natural resources which if it is managed properly can provide the economic benefits to the surrounding. Woods from trees in the forest are one of the economic benefits that can be gained from the forest. However, trees must be logged under a precise calculation and controlled continuously so that they are not extinct. Logging time in a forest is generally determined by the needs of farmers, which may not necessarily provide maximum benefits. Therefore, harvesting management is needed to obtain optimal benefits while still maintaining the forest sustainability. This paper discusses a basic model of the tree harvesting using Linear Algebra which is applied to one of economically valuable trees, i.e., Gmelina arborea Roxb. on the community forest in Tasikmalaya and Banjar, West Java. Initially, the tree population is divided into 16 class intervals based on their diameter. Analysis of the harvesting model implies that the optimal results will be obtained by logging all of trees in one class with the highest selling value. By applying this scenario, all of the Gmelina arborea Roxb. on the community forest in Tasikmalaya and Banjar, West Java must be logged at the 9th class which will provide a maximum profit of IDR 12,491,843.889 for every 1,000 trees harvested.
Kebijakan Pengendalian Persediaan Bahan Baku Kertas Menggunakan Model P Berdasarkan Peramalan Kebutuhan Produksi (Studi Kasus: Penerbit X) Sani, Jihan Gita; Triska, Anita
Diophantine Journal of Mathematics and Its Applications Vol. 2 No. 2 (2023)
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/diophantine.v2i2.31119

Abstract

Raw materials are important for a company, but the stockpile of raw materials that accumulates too many and too long adds to the inventory costs. Therefore, an appropriate inventory policy is needed to meet uncertain needs. This study discusses the uncertain need for paper raw materials at the Publisher X using the Additive Decomposition Forecasting method to determine the paper needs in the future. The Additive Decomposition Forecasting Method is used since the demand for paper raw materials is seasonal and tends to increase. Furthermore, after knowing the need of paper raw materials, inventory control planning is carried out by using P Model with the back order case because of the constant order period. The results of this study indicate that by implementing an inventory control policy with P Model with the case of back order, the Publisher X is able to save as 0.9067% of total inventory cost compared to the total cost using the company’s policy that have been used before.
Perbandingan Penerapan Metode VBEOQ dan Metode Persediaan Multi Item Periode Pemesanan Tunggal untuk Meningkatkan Economic Value Added (EVA) Pada Usaha Mikro Hadi, Muthia Nurul; Triska, Anita
Diophantine Journal of Mathematics and Its Applications Vol. 3 No. 1 (2024)
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/diophantine.v3i1.31120

Abstract

Every company requires minimum costs in controlling inventory and maximizing the company value. The company value is an investor's perception of the company success level. Therefore, the inventory management system have to contribute to realize these goals. Besides influencing the company value, inventory control is also useful to expedite the company activities. An alternative solution to maximize the company value is by increasing the economic value added (EVA). The change of EVA ΔEVA) can be analyzed using the Value Based Economic Order Quantity (VBEOQ) method which each item is ordered separately. However, in a company may manage many items. In order to overcome this problem, ΔEVA can be analyzed using the multi-item inventory method of a single order period. These two methods are used to analyze EVA in the micro enterprise Depot Tutup Galon X. Based on the analysis, it is found that by using the VBEOQ method and multi item inventory for a single order period increase the ΔEVA as Rp12,629,947,00 and Rp14,355,057,00, respectively. These results indicate that applying the multi-item inventory method for a single order period at Depot Tutup Galon X is better since it increases the ΔEVA larger.
Co-Authors Alamsyah, Alifa Raida Andzar Tsaqif Laksana Asep K. Supriatna Edi Kurniadi Ellena, Siti Aizal Yasni Glenn Lahodny Jr. Hadi, Muthia Nurul Heni Widayani Hidayat, Zaki Maulana Julita Nahar Julita Nahar, Julita Laksana, Andzar Tsaqif Lidia H. Y. A. Rudamaga Mona Zevika Muhammad Audri Indraputra Muhammad Haekal Dzulfikar Nuning Nuraini Nursanti Anggriani Nurul Gusriani, Nurul PUTRI NUR PRASETIA Raihanah Raihanah Sani, Jihan Gita Setiawan, Ade Ripki Sisilia Sylviani Supian, Sudradjat Triesha Syifahati Zainurrisalah, Fathulhanif Salman Zaki Maulana Hidayat