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Leonardus Obe
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Computer Science & IT Decision Sciences, Operations Research & Management Education Health Professions Immunology & microbiology

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OPTIMALISASI BIAYA PENDISTRIBUSIAN TAHU PADA PERUSAHAAN TAHU BERIKA: Case Study: Tahu Berika Company, Laleten Village, Weliman District, Malacca Regency 2023 Oktovianus Nahak; Oktovianus Sikas; Faustinus Luan; Leonardus Obe
Journal of Mathematics Theory and Applications Vol. 3 No. 1 (2024): Edisi Oktober 2024
Publisher : Program Studi Matematika, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/j-math.v3i1.5745

Abstract

This study aims to find out how to optimize the cost of distribution t ahu, with the Nort West Corner method and the Stepping Stone method in t ahu Berika companies. To find out how distribution costs compare before and after conducting research on tahu Berika companies. The transportation method is one of the methods used to find the cheapest way to distribute products from several sources (distribution centers, warehouses) to several destinations so that total transportation costs are minimized. The conclusions obtained from this research are as follows: The cost of distributing tofu using the Nort West Corner method as an initial solution for Berika tofu companies in March 2023 is; while the cost of distributing tofu using the Stepping Stone method as the final solution to Berika tofu companies in March 2023 is by using the Nort West Corner method as the initial solution and the Stepping Stone method as the final solution, the total minimum distribution costs obtained by each of them are  and while the calculations made by the company know Berika before using the Nort West Corner method and the Stepping Stone method are as large as.  With the savings in distribution costs of each is as large as and
PENERAPAN PROGRAM DINAMIK PROBABILISTIK DALAM PENGENDALIAN PERSEDIAAN BAHAN BAKU UNTUK MEMINIMUMKAN BIAYA PRODUKSI DENGAN MEMPERTIMBANGKAN MASA KEDALUWARSA: bahasa indonesia Anjelina Tefi; Fried Allung Blegur; Leonardus Obe; Elinora Bano
Journal of Mathematics Theory and Applications Vol. 4 No. 1 (2025): Edisi Oktober 2025
Publisher : Program Studi Matematika, Universitas Timor

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Abstract

ABSTRAK Untuk menjaga proses produksi berjalan lancar diperlukan suatu perencanaan dan pengendalian persediaan bahan baku yang baik. Penelitian ini bertujuan untuk mengetahui penerapan program dinamik probabilistik dalam pengendalian persediaan bahan baku untuk meminimumkan biaya produksi dengan mempertimbangkan masa kedaluwarsa. Masalah produksi dan pengendalian persediaan dapat diselesaikan dengan menggunakan metode program dinamik. Proses perhitungan untuk mendapatkan total biaya produksi minimum yang dikeluarkan oleh pihak KCS Bakery tanpa menggunakan program dinamik adalah sebesar Rp 24.192.619,84 dengan keuntungan sebesar Rp. 84.497.380 biaya yang dikeluarkan berdasarkan jumlah produksi roti setiap periode Januari-Desember 2022. Setelah menggunakan program dinamik diperoleh biaya produksi minimum adalah Rp. 18.467.460 dengan keuntungan Rp. 92.129.040 dalam jangka waktu 1 tahun (12 bulan). Kata Kunci: produksi, program dinamik probabilistik
ANALISIS KESTABILAN MODEL MATEMATIKA KECANDUAN ALKOHOL TIPE SDAR Giovani Sanit; Leonardus Obe; Nugraha Dethan; Faustianus Luan
Journal of Mathematics Theory and Applications Vol. 4 No. 1 (2025): Edisi Oktober 2025
Publisher : Program Studi Matematika, Universitas Timor

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Abstract

Alcohol is a psychoactive substance that is addictive. Psychoactive substances are a class of substances that act selectively, especially on the brain, which can cause changes in a person's behavior, emotions, cognition, perception and consciousness. Alcohol is an addictive substance that can cause addiction and dependence. Alcohol addiction is a condition when a person experiences an addiction to alcohol and is difficult to control until he becomes dependent. Alcohol addiction occurs due to consuming too much alcohol so that the level is sufficient to cause mental changes and experience a sensation of satisfaction when consumed. The habit of consuming alcohol for teenagers begins due to a lack of knowledge and invitations, persuasion and seduction from friends which make a teenager want to try consuming alcohol. After getting to know and feel the sensation of consuming alcohol, a teenager gradually begins to fall into the world of alcohol and begins to increase his consumption due to the free social environment among teenagers. This research aims to build a mathematical model of SDAR type alcohol addiction. Based on the research results, two equilibrium points were obtained, namely the equilibrium point free from alcohol addiction and will be stable when and the equilibrium point where there is alcohol addiction and will be stable when . The simulation results were observed in two conditions, namely when and the value was obtained, meaning that the rate of movement from the population of teenagers who tried to consume alcohol to alcohol addiction was still small, so that teenagers who Alcohol addiction will decrease until alcoholics will disappear from the population over time. Then when and the value is obtained, meaning that the rate of movement from the population of teenagers who try to consume alcohol to alcohol addiction is increasing until there will be more and more alcoholics and will increase in the population as along the time.
PEMODELAN MATEMATIKA DAN SIMULASI PENYEBARAN PERILAKU MEROKOK TERHADAP LAKI-LAKI DENGAN MEMPERHATIKAN FAKTOR LINGKUNGAN PERTEMANAN Maria Redegundis Lopena; Faustianus Luan; Leonardus Obe; Fried Allung Blegur
Journal of Mathematics Theory and Applications Vol. 4 No. 1 (2025): Edisi Oktober 2025
Publisher : Program Studi Matematika, Universitas Timor

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Abstract

Rokok adalah hasil olahan tembakau yang digulung/dilinting dengan kertas baik menggunakan tangan atau mesin. Perilaku merokok merupakan suatu aktivitas membakar tembakau, menghisap lalu menghembuskan asapnya. Merokok telah diketahui menjadi faktor resiko karena mengandung zat-zat kimia yang berdampak buruk bagi kesehatan. Matematika merupakan salah satu ilmu yang dapat menganalisa masalah yang terjadi dalam kehidupan dengan menggunakan pemodelan matematika. Salah satu masalah yang dapat dikaji dengan model matematika adalah penyebaran perilaku merokok. Penelitian ini mengkaji penyebaran perilaku merokok terhadap laki-laki dengan memperhatikan faktor lingkungan pertemanan. Model ini membagi menjadi empat subpopulasi yaitu: subpopulasi laki-laki yang berpotensi menjadi perokok , subpopulasi laki-laki yang hanya coba-coba merokok , subpopulasi laki-laki perokok aktif , subpopulasi laki-laki yang sembuh dari pengaruh rokok . Berdasarkan hasil penelitian diperoleh dua titik ekuilibrium yaitu titik ekuilibrium bebas merokok dan titik ekuilibrium endemik . Hasil simulasi titik ekuilibrium bebas merokok menunjukan bahwa nilai , maka perilaku merokok berkurang dan akan hilang seiring berjalannya waktu. Hasil simulasi titik ekuilibrium endemik menunjukan bahwa nilai , maka perilaku merokok akan meningkat dan setiap perokok dapat menularkan perilaku merokoknya kepada lebih dari satu perokok baru sehingga perilaku merokok semakin meluas.
Co-Authors Anjelina Tefi Elinora Bano Faustianus Luan Faustinus Luan Fried Markus Allung Blegur Giovani Sanit Maria Redegundis Lopena Nugraha Dethan Oktovianus Nahak Oktovianus Sikas