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All Journal Jurnal Matematika UNAND Jurnal Pengabdian Kepada Masyarakat (JPKM) Tabikpun
Nikken Prima Puspita
Universitas Diponegoro
Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Health Professions Mathematics

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Pengelolaan Hutan Produktif untuk Pelestarian Hutan Lampung Menggunakan Operasi Perkalian Modul R^n atas Ring M_n(R) Nikken Prima Puspita; Fitriani Fitriani; Ahmad Faisol; Lucia Ratnasari
Jurnal Pengabdian Kepada Masyarakat (JPKM) TABIKPUN Vol. 4 No. 1 (2023)
Publisher : Faculty of Mathematics and Natural Sciences - Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpkmt.v4i1.106

Abstract

This activity is in the form of a seminar on productive forest harvesting models. The topic presented is modeling which is done by classifying trees in an area into classes based on their height. Then a two-vector equation model is formulated so that the harvested and unharvested tree configurations are balanced and sustainable and produce an optimal profit. So this model can be used to calculate optimal profit but still pay attention to forest sustainability. Profit is calculated based on three components: harvest vector, non-harvest vector, and Growth Rate matrix. Based on the results of the discussion, there are several obstacles to the model that has been constructed so that it can be used in the Lampung region and become an opportunity for research and collaboration between academics and local government. Furthermore, this forest management model can be modified for fruit-type productive forests such as Lampung coffee or siger avocados which the Lampung Provincial Forestry Service is currently cultivating.
Sosialisasi Model Economic Production Quantity untuk Mengoptimalkan Hasil Produksi Kopi di KPH Kota Agung Utara Nikken Prima Puspita; Siti Khabibah; Lucia Ratnasari; Fitriani Fitriani; Ahmad Faisol; Akmal Junaidi
Jurnal Pengabdian Kepada Masyarakat (JPKM) TABIKPUN Vol. 4 No. 3 (2023)
Publisher : Faculty of Mathematics and Natural Sciences - Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpkmt.v4i3.131

Abstract

Provinsi Lampung sudah dikenal sebagai penghasil kopi terbaik di Indonesia. Proses pengolahan mulai dari buah kopi mentah, hingga menghasilkan kopi bubuk membutuhkan biaya yang akan dikeluarkan oleh petani kopi pada setiap siklus tanam dan panen tanaman kopi. Kegiatan Pengabdian Kepada Masyarakat ini dilakukan oleh matematikawan Indonesian Mathematical Society wilayah DIY Jateng dan Sumatera Bagian Selatan. Pada kegiatan ini diadakan sosialisasi yang menawarkan solusi model matematika yaitu Model Economic Production Quantity (EPQ) untuk meminimumkan biaya total produksi biji kopi Lampung. Model ini digunakan untuk mengatur siklus produksi biji kopi dengan memperhitungkan komponen biaya pada persiapan produksi, proses produksi hingga produk sampai pada pembeli. Dengan kegiatan ini, para Petani Kopi Lampung dapat mengatur siklus tanam dan produksi biji kopi yang terbaik.
LEONTIEF MATRIX: BUSINESS MODEL RECOMMENDATION FOR EXPORT COMMODITY OF NORTH SUMATERA Nur Khasanah; Nikken Prima Puspita; Fitriana Hasnani; Meryta Febrilian Fatimah; Zakaria Bani Ikhtiyar
Jurnal Matematika UNAND Vol. 15 No. 1 (2026)
Publisher : Departemen Matematika dan Sains Data FMIPA Universitas Andalas Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jmua.15.1.95-107.2026

Abstract

The open model as the one the application of Leontief model using the explanation of the economy with input-output model. The open model shows the number of productions needed to satisfy an increase in internal and external demand. By using the operation linear algebra operation on ring characteristics, then the production numbers are calculated. This method is applied on the ten product-producing commodities of North Sumatera export demand to find the total production number, while the amount of demand is defined. It shows a solution to the minimization linear program is the solution that will satisfy both internal and external demands of the commodity with minimum inventory level.
Co-Authors Ahmad Faisol Akmal Junaidi Fitriana Hasnani Fitriani Lucia Ratnasari Meryta Febrilian Fatimah Nur Khasanah Siti Khabibah Titi Udjiani Zakaria Bani Ikhtiyar Zakaria Bani Ikhtiyar